diff --git a/CMakeLists.txt b/CMakeLists.txt
index a266d70..92c3984 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,7 +46,7 @@ add_executable(
     src/packages/game/input/IZ_keyboard.h
     src/packages/game/IZ_config.c
     src/packages/game/IZ_config.h
-    src/packages/game/geometry/IZ_point2d.c src/packages/game/geometry/IZ_point2d.h src/packages/game/geometry/IZ_vector2d.c src/packages/game/geometry/IZ_vector2d.h src/packages/game/geometry/IZ_rect.c src/packages/game/geometry/IZ_rect.h src/packages/game/core/IZ_object.c src/packages/game/core/IZ_object.h src/packages/game/core/IZ_creature.c src/packages/game/core/IZ_creature.h src/packages/game/core/IZ_entity.c src/packages/game/core/IZ_entity.h src/packages/game/memory/IZ_pool.c src/packages/game/memory/IZ_pool.h src/packages/game/input/IZ_input.c src/packages/game/input/IZ_input.h src/packages/game/input/IZ_midi.c src/packages/game/input/IZ_midi.h)
+    src/packages/game/geometry/IZ_point2d.c src/packages/game/geometry/IZ_point2d.h src/packages/game/geometry/IZ_vector2d.c src/packages/game/geometry/IZ_vector2d.h src/packages/game/geometry/IZ_rect.c src/packages/game/geometry/IZ_rect.h src/packages/game/core/IZ_object.c src/packages/game/core/IZ_object.h src/packages/game/core/IZ_creature.c src/packages/game/core/IZ_creature.h src/packages/game/core/IZ_entity.c src/packages/game/core/IZ_entity.h src/packages/game/memory/IZ_pool.c src/packages/game/memory/IZ_pool.h src/packages/game/input/IZ_input.c src/packages/game/input/IZ_input.h src/packages/game/input/IZ_midi.c src/packages/game/input/IZ_midi.h src/packages/game/data/IZ_list.c src/packages/game/data/IZ_list.h)
 
 target_link_libraries(
   game
@@ -118,7 +118,17 @@ add_executable(
 
     src/packages/game/memory/IZ_pool.h
     src/packages/game/memory/IZ_pool.c
-        src/packages/game/memory/memory.test.c)
+        src/packages/game/memory/memory.test.c src/packages/game/data/IZ_list.c src/packages/game/data/IZ_list.h)
+
+add_executable(
+  game-test-data
+    dependencies/bdd-for-c/bdd-for-c.h
+    src/packages/test/IZ_mock.h
+    src/packages/test/IZ_test.h
+
+        src/packages/game/data/IZ_list.h
+        src/packages/game/data/IZ_list.c
+        src/packages/game/data/data.test.c)
 
 if (WIN32)
   add_custom_command(TARGET game POST_BUILD
diff --git a/__mocks__/SDL_stdinc.mock.h b/__mocks__/SDL_stdinc.mock.h
index 8e8b099..1f768b1 100644
--- a/__mocks__/SDL_stdinc.mock.h
+++ b/__mocks__/SDL_stdinc.mock.h
@@ -2,10 +2,23 @@
 #define SDL_STDINC_MOCK_H
 
 #include <string.h>
+#include "../src/packages/game/IZ_common.h"
 #include "../src/packages/test/IZ_test.h"
 
 mock(SDL_memcpy) void* SDL_memcpy(void* dst, const void* src, size_t len) {
 	mock_return(SDL_memcpy) memcpy(dst, src, len);
 }
 
+mock(SDL_memset) void* SDL_memset(void* dst, i32 c, size_t len) {
+	mock_return(SDL_memset) memset(dst, c, len);
+}
+
+mock(SDL_malloc) void* SDL_malloc(size_t size) {
+	mock_return(SDL_malloc) malloc(size);
+}
+
+mock(SDL_free) void SDL_free(void* mem) {
+	mock_return(SDL_free);
+}
+
 #endif
diff --git a/src/packages/game/IZ_app.c b/src/packages/game/IZ_app.c
index 6cc128c..4d2810a 100644
--- a/src/packages/game/IZ_app.c
+++ b/src/packages/game/IZ_app.c
@@ -20,15 +20,7 @@ IZ_ProcedureResult IZ_AppInitialize(IZ_App* app) {
 	}
 
 	IZ_InputInitialize(config_path, &app->input_state);
-	IZ_PoolInitialize(&app->pool);
-//	void* p1 = IZ_PoolAllocate(&app->memory_pool, sizeof(u16), 0)->pointer;
-//	void* p2 = IZ_PoolAllocate(&app->memory_pool, sizeof(u8), 0)->pointer;
-//	void* p3 = IZ_PoolAllocate(&app->memory_pool, sizeof(u64), 0)->pointer;
-//	void* p4 = IZ_PoolAllocate(&app->memory_pool, sizeof(u32), 0)->pointer;
-//	printf("\n%p %p %p %p\n", p1, p2, p3, p4);
-//	IZ_PoolDeallocate(p1);
-//	void* p5 = IZ_PoolAllocate(&app->memory_pool, sizeof(u16), 0)->pointer;
-//	printf("\n%p\n", p5);
+	IZ_PoolInitialize(&app->pool, POOL_MAX_SIZE);
 
   // TODO put into its timer module
 	app->ticks = 0;
diff --git a/src/packages/game/IZ_common.h b/src/packages/game/IZ_common.h
index 18ca1d6..d1448e2 100644
--- a/src/packages/game/IZ_common.h
+++ b/src/packages/game/IZ_common.h
@@ -2,6 +2,7 @@
 #define IZ_COMMON_H
 
 #include <stdint.h>
+#include <stdbool.h>
 
 #define PLAYERS (unsigned char) 1
 #define APP_NAME "SDL2"
diff --git a/src/packages/game/data/IZ_list.c b/src/packages/game/data/IZ_list.c
new file mode 100644
index 0000000..66a0a3e
--- /dev/null
+++ b/src/packages/game/data/IZ_list.c
@@ -0,0 +1,77 @@
+#include "IZ_list.h"
+
+bool IZ_ListFindFilterAlwaysTrue(IZ_ListNode* _node, u64 _index) {
+	return true;
+}
+
+void IZ_ListInitialize(IZ_List* list) {
+	list->root = NULL;
+}
+
+void IZ_ListTeardown(IZ_List* list) {
+	while (list->root) {
+		_IZ_ListDeleteFirstNode(list, IZ_ListFindFilterAlwaysTrue);
+	}
+}
+
+IZ_ListNode* IZ_ListAppendNode(IZ_List* list, void* node_value) {
+	IZ_ListNode* new_node = SDL_malloc(sizeof(IZ_ListNode));
+	new_node->value = node_value;
+	if (!(list->root)) {
+		list->root = new_node;
+	} else {
+		IZ_ListNode *last_node = list->root;
+		while (last_node->next) {
+			last_node = last_node->next;
+		}
+		last_node->next = new_node;
+	}
+	new_node->next = NULL;
+	return new_node;
+}
+
+void _IZ_ListDeleteFirstNode(IZ_List* list, IZ_ListFindFilter filter) {
+	if (!(list && list->root)) {
+		return;
+	}
+
+	IZ_ListNode* iterator = list->root;
+	IZ_ListNode* previous_node = NULL;
+	u64 index = 0;
+	do {
+		if (!filter(iterator, index)) {
+			previous_node = iterator;
+			iterator = iterator->next;
+			index += 1;
+			continue;
+		}
+
+		if (previous_node) {
+			previous_node->next = iterator->next;
+		} else {
+			list->root = iterator->next;
+		}
+
+		SDL_free(iterator);
+		return;
+	} while (iterator);
+}
+
+IZ_ListNode* _IZ_ListFindFirstNode(IZ_List* list, IZ_ListFindFilter filter) {
+	if (!(list && list->root)) {
+		return NULL;
+	}
+
+	IZ_ListNode* iterator = list->root;
+	u64 index = 0;
+	do {
+		if (!filter(iterator, index)) {
+			iterator = iterator->next;
+			index += 1;
+			continue;
+		}
+		return iterator;
+	} while (iterator);
+
+	return NULL;
+}
diff --git a/src/packages/game/data/IZ_list.h b/src/packages/game/data/IZ_list.h
new file mode 100644
index 0000000..df56aa8
--- /dev/null
+++ b/src/packages/game/data/IZ_list.h
@@ -0,0 +1,34 @@
+#ifndef IZ_LIST_H
+#define IZ_LIST_H
+
+#include "../IZ_common.h"
+#include "SDL_stdinc.h"
+
+typedef struct IZ_ListNode {
+	void* value;
+	struct IZ_ListNode* next;
+} IZ_ListNode;
+
+typedef struct {
+	IZ_ListNode* root;
+} IZ_List;
+
+typedef bool IZ_ListFindFilter(IZ_ListNode*, u64);
+
+void IZ_ListInitialize(IZ_List*);
+
+void IZ_ListTeardown(IZ_List*);
+
+IZ_ListNode* IZ_ListAppendNode(IZ_List*, void*);
+
+#define IZ_LIST_FILTER_FUNCTION(X) static IZ_PoolItem* X = NULL;
+
+void _IZ_ListDeleteFirstNode(IZ_List*, IZ_ListFindFilter);
+
+#define IZ_ListDeleteFirstNode(X, Y) X = Y; _IZ_ListDeleteFirstNode
+
+IZ_ListNode* _IZ_ListFindFirstNode(IZ_List*, IZ_ListFindFilter);
+
+#define IZ_ListFindFirstNode(X, Y) X = Y; _IZ_ListFindFirstNode
+
+#endif
diff --git a/src/packages/game/data/data.test.c b/src/packages/game/data/data.test.c
new file mode 100644
index 0000000..65e2f24
--- /dev/null
+++ b/src/packages/game/data/data.test.c
@@ -0,0 +1,166 @@
+#include "../../test/IZ_test.h"
+#include "../../game/IZ_common.h"
+#include "../../../__mocks__/SDL_stdinc.mock.h"
+#include "IZ_list.h"
+
+bool NodeExists(IZ_ListNode* node, u64 _index) {
+	return *((u64*) node->value) == 42069;
+}
+
+bool NodeExists2(IZ_ListNode* node, u64 _index) {
+	return *((u64*) node->value) == 69420;
+}
+
+bool NodeDoesNotExist(IZ_ListNode* node, u64 _index) {
+	return *((u64*) node->value) == 55555;
+}
+
+spec("data") {
+	describe("list") {
+		describe("Initialize") {
+			static IZ_List list;
+			it("sets root to NULL") {
+				IZ_ListInitialize(&list);
+
+				check(list.root == NULL, "List not properly initialized.");
+			}
+		}
+
+		describe("Teardown") {
+			static IZ_List list;
+
+			before_each() {
+				static u64 value1 = 69420u;
+				static u64 value2 = 42069u;
+				static u64 value3 = 69069u;
+
+				IZ_ListInitialize(&list);
+				IZ_ListAppendNode(&list, &value1);
+				IZ_ListAppendNode(&list, &value2);
+				IZ_ListAppendNode(&list, &value3);
+			}
+
+			after_each() {
+				mock_reset(SDL_free);
+			}
+
+			it("removes all nodes from the list") {
+				mock_set_expected_calls(SDL_free, 3);
+				IZ_ListTeardown(&list);
+
+				check(
+					mock_get_expected_calls(SDL_free) == mock_get_actual_calls(SDL_free),
+					"Deallocator function call count mismatch."
+				);
+			}
+		}
+
+		describe("AppendNode") {
+			static IZ_List list;
+			static IZ_List list2;
+
+			before_each() {
+				IZ_ListInitialize(&list);
+			}
+
+			before_each() {
+				IZ_ListInitialize(&list2);
+				static u64 existing_value = 69420u;
+				static IZ_ListNode existing_node = {
+					.value = &existing_value,
+					.next = NULL,
+				};
+				list2.root = &existing_node;
+			}
+
+			after_each() {
+				mock_reset(SDL_malloc);
+			}
+
+			it("appends new node to empty list and sets it as root") {
+				static u64 value = 69420u;
+				IZ_ListAppendNode(&list, &value);
+
+				check(*((u64*) list.root->value) == 69420u, "Node not properly appended.");
+				check(
+					mock_is_called(SDL_malloc),
+					"Allocator function not called."
+				);
+			}
+
+			it("appends new node to non-empty list") {
+				static u64 value1 = 42069u;
+
+				IZ_ListAppendNode(&list2, &value1);
+
+				check(*((u64*) list2.root->next->value) == 42069u, "Node not properly appended.");
+				check(
+					mock_is_called(SDL_malloc),
+					"Allocator function not called."
+				);
+			}
+		}
+
+		describe("FindFirstNode") {
+			static IZ_List list;
+			static u64 value1 = 69420u;
+			static u64 value2 = 42069u;
+
+			before_each() {
+				IZ_ListInitialize(&list);
+				IZ_ListAppendNode(&list, &value1);
+				IZ_ListAppendNode(&list, &value2);
+			}
+
+			it("retrieves first node satisfying the filter condition") {
+				static IZ_ListNode* node;
+				node = _IZ_ListFindFirstNode(&list, NodeExists);
+				check(*((u64*) node->value) == 42069u, "Existing node not found.");
+			}
+
+			it("returns NULL when all nodes do not satisfy the filter condition") {
+				static IZ_ListNode* node;
+				node = _IZ_ListFindFirstNode(&list, NodeDoesNotExist);
+				check(node == NULL, "Non-existing node found.");
+			}
+		}
+
+		describe("DeleteFirstNode") {
+			static IZ_List list;
+
+			before_each() {
+				static u64 value1 = 69420u;
+				static u64 value2 = 42069u;
+				static u64 value3 = 69069u;
+
+				IZ_ListInitialize(&list);
+				IZ_ListAppendNode(&list, &value1);
+				IZ_ListAppendNode(&list, &value2);
+				IZ_ListAppendNode(&list, &value3);
+			}
+
+			after_each() {
+				mock_reset(SDL_free);
+			}
+
+			it("removes first node satisfying the filter condition") {
+				_IZ_ListDeleteFirstNode(&list, NodeExists);
+
+				check(
+					mock_is_called(SDL_free),
+					"Deallocator function not called."
+				);
+
+				check(
+					_IZ_ListFindFirstNode(&list, NodeExists2),
+					"Node supposed to be present in list is absent."
+				);
+
+				check(
+					!_IZ_ListFindFirstNode(&list, NodeExists),
+					"Deleted node still present in list."
+				);
+			}
+		}
+	}
+}
diff --git a/src/packages/game/geometry/IZ_point2d.c b/src/packages/game/geometry/IZ_point2d.c
index 84caab7..4be59b2 100644
--- a/src/packages/game/geometry/IZ_point2d.c
+++ b/src/packages/game/geometry/IZ_point2d.c
@@ -1,6 +1,6 @@
 #include "IZ_point2d.h"
 
-IZ_Point2D IZ_PointTranslate(IZ_Point2D point, IZ_GeoCoord translate_x, IZ_GeoCoord translate_y) {
+IZ_Point2D IZ_Point2DTranslate(IZ_Point2D point, f32 translate_x, f32 translate_y) {
 	return (IZ_Point2D) {
 		.x = point.x + translate_x,
 		.y = point.y + translate_y,
diff --git a/src/packages/game/geometry/IZ_point2d.h b/src/packages/game/geometry/IZ_point2d.h
index 7e514b4..9718cf1 100644
--- a/src/packages/game/geometry/IZ_point2d.h
+++ b/src/packages/game/geometry/IZ_point2d.h
@@ -3,13 +3,11 @@
 
 #include "../IZ_common.h"
 
-typedef f32 IZ_GeoCoord;
-
 typedef struct {
-	IZ_GeoCoord x;
-	IZ_GeoCoord y;
+	f32 x;
+	f32 y;
 } IZ_Point2D;
 
-IZ_Point2D IZ_PointTranslate(IZ_Point2D, IZ_GeoCoord, IZ_GeoCoord);
+IZ_Point2D IZ_Point2DTranslate(IZ_Point2D, f32, f32);
 
 #endif
diff --git a/src/packages/game/geometry/IZ_rect.h b/src/packages/game/geometry/IZ_rect.h
index 747aa74..3733005 100644
--- a/src/packages/game/geometry/IZ_rect.h
+++ b/src/packages/game/geometry/IZ_rect.h
@@ -5,17 +5,17 @@
 #include "IZ_point2d.h"
 
 typedef struct {
-	IZ_GeoCoord left;
-	IZ_GeoCoord top;
-	IZ_GeoCoord right;
-	IZ_GeoCoord bottom;
+	f32 left;
+	f32 top;
+	f32 right;
+	f32 bottom;
 } IZ_Bounds;
 
 typedef struct {
 	// top left
 	IZ_Point2D pos;
-	IZ_GeoCoord width;
-	IZ_GeoCoord height;
+	f32 width;
+	f32 height;
 } IZ_Rect;
 
 IZ_Bounds IZ_RectGetBounds(IZ_Rect);
diff --git a/src/packages/game/geometry/IZ_vector2d.c b/src/packages/game/geometry/IZ_vector2d.c
index 5d86aa4..f33247c 100644
--- a/src/packages/game/geometry/IZ_vector2d.c
+++ b/src/packages/game/geometry/IZ_vector2d.c
@@ -1,20 +1,20 @@
 #include "IZ_vector2d.h"
 
-IZ_Vector2D IZ_VectorAdd(IZ_Vector2D addend, IZ_Vector2D augend) {
+IZ_Vector2D IZ_Vector2DAdd(IZ_Vector2D addend, IZ_Vector2D augend) {
 	return (IZ_Vector2D) {
 		.right = addend.right + augend.right,
 		.up = addend.up + augend.up,
 	};
 }
 
-IZ_Vector2D IZ_VectorMultiply(IZ_Vector2D multiplicand, IZ_Vector2D multiplier) {
+IZ_Vector2D IZ_Vector2DMultiply(IZ_Vector2D multiplicand, IZ_Vector2D multiplier) {
 	return (IZ_Vector2D) {
 		.right = multiplicand.right * multiplier.right,
 		.up = multiplicand.up * multiplier.up,
 	};
 }
 
-IZ_Vector2D IZ_VectorScale(IZ_Vector2D vector, IZ_GeoCoord scalar) {
+IZ_Vector2D IZ_Vector2DScale(IZ_Vector2D vector, f32 scalar) {
 	return (IZ_Vector2D) {
 		.right = vector.right * scalar,
 		.up = vector.up * scalar,
diff --git a/src/packages/game/geometry/IZ_vector2d.h b/src/packages/game/geometry/IZ_vector2d.h
index 35580cf..53676be 100644
--- a/src/packages/game/geometry/IZ_vector2d.h
+++ b/src/packages/game/geometry/IZ_vector2d.h
@@ -4,14 +4,14 @@
 #include "IZ_point2d.h"
 
 typedef struct {
-	IZ_GeoCoord right;
-	IZ_GeoCoord  up;
+	f32 right;
+	f32 up;
 } IZ_Vector2D;
 
-IZ_Vector2D IZ_VectorAdd(IZ_Vector2D, IZ_Vector2D);
+IZ_Vector2D IZ_Vector2DAdd(IZ_Vector2D, IZ_Vector2D);
 
-IZ_Vector2D IZ_VectorMultiply(IZ_Vector2D, IZ_Vector2D);
+IZ_Vector2D IZ_Vector2DMultiply(IZ_Vector2D, IZ_Vector2D);
 
-IZ_Vector2D IZ_VectorScale(IZ_Vector2D, IZ_GeoCoord);
+IZ_Vector2D IZ_Vector2DScale(IZ_Vector2D, f32);
 
 #endif
diff --git a/src/packages/game/geometry/geometry.test.c b/src/packages/game/geometry/geometry.test.c
index 778bf77..f219cf9 100644
--- a/src/packages/game/geometry/geometry.test.c
+++ b/src/packages/game/geometry/geometry.test.c
@@ -5,7 +5,7 @@
 
 spec("geometry") {
 	describe("point2d") {
-		describe("PointTranslate") {
+		describe("Translate") {
 			it("translates coordinates of a point") {
 				static IZ_Point2D input = {
 					.x = 420.f,
@@ -18,7 +18,7 @@ spec("geometry") {
 				};
 
 				static IZ_Point2D actual;
-				actual = IZ_PointTranslate(input, 6.f, 9.f);
+				actual = IZ_Point2DTranslate(input, 6.f, 9.f);
 
 				check(expected.x == actual.x, "X values do not match.");
 				check(expected.y == actual.y, "Y values do not match.");
@@ -27,7 +27,7 @@ spec("geometry") {
 	}
 
 	describe("vector2d") {
-		describe("VectorAdd") {
+		describe("Add") {
 			it("adds two vectors") {
 				static IZ_Vector2D addend = {
 					.right = 420.f,
@@ -45,14 +45,14 @@ spec("geometry") {
 				};
 
 				static IZ_Vector2D actual_sum;
-				actual_sum = IZ_VectorAdd(addend, augend);
+				actual_sum = IZ_Vector2DAdd(addend, augend);
 
 				check(expected_sum.right == actual_sum.right, "Right values do not match.");
 				check(expected_sum.up == actual_sum.up, "Up values do not match.");
 			}
 		}
 
-		describe("VectorMultiply") {
+		describe("Multiply") {
 			it("multiplies two vectors") {
 				static IZ_Vector2D multiplicand = {
 					.right = 6.f,
@@ -70,14 +70,14 @@ spec("geometry") {
 				};
 
 				static IZ_Vector2D actual_product;
-				actual_product = IZ_VectorMultiply(multiplicand, multiplier);
+				actual_product = IZ_Vector2DMultiply(multiplicand, multiplier);
 
 				check(expected_product.right == actual_product.right, "Right values do not match.");
 				check(expected_product.up == actual_product.up, "Up values do not match.");
 			}
 		}
 
-		describe("VectorScale") {
+		describe("Scale") {
 			it("scales a vector") {
 				static IZ_Vector2D v = {
 					.right = 420.f,
@@ -92,7 +92,7 @@ spec("geometry") {
 				};
 
 				static IZ_Vector2D actual;
-				actual = IZ_VectorScale(v, s);
+				actual = IZ_Vector2DScale(v, s);
 
 				check(expected.right == actual.right, "Right values do not match.");
 				check(expected.up == actual.up, "Up values do not match.");
@@ -101,7 +101,7 @@ spec("geometry") {
 	}
 
 	describe("rect") {
-		describe("RectGetBounds") {
+		describe("GetBounds") {
 			it("returns the bounds of a rectangle") {
 				static IZ_Rect r = {
 					.pos = {
@@ -129,7 +129,7 @@ spec("geometry") {
 			}
 		}
 
-		describe("RectBoundsContainPoint") {
+		describe("BoundsContainPoint") {
 			it("returns true for points inside bounds") {
 				static IZ_Bounds b = {
 					.left = 50,
@@ -185,7 +185,7 @@ spec("geometry") {
 			}
 		}
 
-		describe("RectBoundsCollide") {
+		describe("BoundsCollide") {
 			it("returns true for bounds A inside bounds B") {
 				static IZ_Bounds a = {
 					.left = 100,
diff --git a/src/packages/game/input/input.test.c b/src/packages/game/input/input.test.c
index 5ce5b4a..ef6eace 100644
--- a/src/packages/game/input/input.test.c
+++ b/src/packages/game/input/input.test.c
@@ -15,7 +15,7 @@ i16 GenerateAxisValueOutsideThreshold(u16 threshold) {
 
 spec("input") {
 	describe("joystick") {
-		describe("JoystickHandleEvents") {
+		describe("HandleEvents") {
 			static SDL_Event e;
 			static IZ_JoystickState state[PLAYERS] = {};
 			static IZ_Action action[PLAYERS] = {};
@@ -259,7 +259,7 @@ spec("input") {
 			}
 		}
 
-		describe("JoystickSaveConfig") {
+		describe("SaveConfig") {
 			static IZ_JoystickState state[PLAYERS];
 
 			after_each() {
@@ -290,7 +290,7 @@ spec("input") {
 	}
 
 	describe("keyboard") {
-		describe("KeyboardHandleEvents") {
+		describe("HandleEvents") {
 			static SDL_Event e;
 			static IZ_KeyboardState state[PLAYERS] = {};
 			static IZ_Action action[PLAYERS] = {};
@@ -326,7 +326,7 @@ spec("input") {
 			}
 		}
 
-		describe("KeyboardSaveConfig") {
+		describe("SaveConfig") {
 			static IZ_KeyboardState state[PLAYERS] = {};
 
 			after_each() {
diff --git a/src/packages/game/memory/IZ_pool.c b/src/packages/game/memory/IZ_pool.c
index 9b314d5..0003d89 100644
--- a/src/packages/game/memory/IZ_pool.c
+++ b/src/packages/game/memory/IZ_pool.c
@@ -1,14 +1,15 @@
 #include "IZ_pool.h"
 
-void IZ_PoolInitialize(IZ_Pool* pool) {
-	SDL_memset(pool->items, 0, POOL_MAX_ITEMS * sizeof(IZ_PoolItem));
-	pool->top = 0;
-	pool->memory = SDL_malloc(POOL_MAX_SIZE);
-	SDL_memset(pool->memory, 0, POOL_MAX_SIZE);
+void IZ_PoolInitialize(IZ_Pool* pool, size_t size) {
+	pool->items = &(IZ_List){ .root = NULL };
+	pool->memory = SDL_malloc(size);
+	SDL_memset(pool->memory, 0, size);
+	pool->allocated_memory = 0;
 	pool->next_address = 0;
+	pool->max_size = size;
 }
 
-IZ_PoolItem* IZ_PoolAllocate(IZ_Pool* pool, size_t size, u64 created_at) {
+IZ_PoolItem* IZ_PoolAllocate(IZ_Pool* pool, size_t size, u64 priority) {
 	// 1. check next free allocation for size
 	// 2. if 1. returns non-null,
 
@@ -20,31 +21,29 @@ IZ_PoolItem* IZ_PoolAllocate(IZ_Pool* pool, size_t size, u64 created_at) {
 //		}
 //	}
 
+	if (pool->max_size - pool->allocated_memory < size) {
+		// TODO deallocate memory based from priority
+	}
+
 	void* pointer = &pool->memory[pool->next_address];
-	IZ_PoolItem* next_allocation = &pool->items[pool->top];
-	pool->items[pool->top] = (IZ_PoolItem) {
+	IZ_ListNode* new_item = IZ_ListAppendNode(pool->items, &(IZ_PoolItem) {
 		.pointer = pointer,
 		.size = size,
-		.created_at = created_at,
+		.priority = priority,
 		.pool = pool,
-	};
-	pool->top = (pool->top + 1) % POOL_MAX_ITEMS;
+	});
+
 	pool->next_address = (pool->next_address + size) % POOL_MAX_SIZE;
-	return next_allocation;
+	pool->allocated_memory += size;
+	return new_item->value;
+}
+
+IZ_LIST_FILTER_FUNCTION(__current_item) bool IZ_PoolGetSameItem(IZ_ListNode* node, u64 _index) {
+	return node->value == __current_item;
 }
 
 void IZ_PoolDeallocate(IZ_PoolItem* item) {
-	u64 i;
-	for (i = 0; i < POOL_MAX_ITEMS; i += 1) {
-		if (&item->pool->items[i] != item) {
-			continue;
-		}
-		item->pool->items[i].pool = NULL;
-		item->pool->items[i].size = 0;
-		item->pool->items[i].pointer = NULL;
-		item->pool->items[i].created_at = 0;
-		return;
-	}
+	IZ_ListDeleteFirstNode(__current_item, item)(item->pool->items, IZ_PoolGetSameItem);
 }
 
 void IZ_PoolTeardown(IZ_Pool* pool) {
diff --git a/src/packages/game/memory/IZ_pool.h b/src/packages/game/memory/IZ_pool.h
index abec363..1f659a9 100644
--- a/src/packages/game/memory/IZ_pool.h
+++ b/src/packages/game/memory/IZ_pool.h
@@ -3,8 +3,8 @@
 
 #include <SDL_stdinc.h>
 #include "../IZ_common.h"
+#include "../data/IZ_list.h"
 
-#define POOL_MAX_ITEMS (1000) // 16 million allocations max
 #define POOL_MAX_SIZE (1l << 23) // 16MB
 
 struct IZ_Pool;
@@ -12,18 +12,19 @@ struct IZ_Pool;
 typedef struct {
 	void* pointer;
 	size_t size;
-	u64 created_at;
+	u64 priority;
 	struct IZ_Pool* pool;
 } IZ_PoolItem;
 
 typedef struct IZ_Pool {
-	u16 top;
+	IZ_List* items;
 	u64 next_address;
-	IZ_PoolItem items[POOL_MAX_ITEMS];
+	u64 allocated_memory;
+	size_t max_size;
 	void* memory;
 } IZ_Pool;
 
-void IZ_PoolInitialize(IZ_Pool*);
+void IZ_PoolInitialize(IZ_Pool*, size_t);
 
 IZ_PoolItem* IZ_PoolAllocate(IZ_Pool*, size_t, u64);
 
diff --git a/src/packages/game/memory/memory.test.c b/src/packages/game/memory/memory.test.c
index 41451d4..3481e51 100644
--- a/src/packages/game/memory/memory.test.c
+++ b/src/packages/game/memory/memory.test.c
@@ -1,18 +1,123 @@
 #include "../../test/IZ_test.h"
+#include "../../../__mocks__/SDL_stdinc.mock.h"
 #include "IZ_pool.h"
 
+struct DummyInnerStruct {
+	i8 f;
+	i8 g;
+};
+
+struct DummyStruct {
+	i8 a;
+	i16 b;
+	i32 c;
+	i64 d;
+	struct DummyInnerStruct e;
+};
+
 spec("memory") {
 	describe("pool") {
 		describe("PoolInitialize") {
+			static IZ_Pool pool;
+
+			after_each() {
+				mock_reset(SDL_memset);
+			}
+
+			after_each() {
+				mock_reset(SDL_malloc);
+			}
+
+			after_each() {
+				IZ_PoolTeardown(&pool);
+			}
+
+			it("initializes the pool values") {
+				mock_set_expected_calls(SDL_memset, 1);
 
+				IZ_PoolInitialize(&pool, POOL_MAX_SIZE);
+
+				check(
+					mock_get_expected_calls(SDL_memset) == mock_get_actual_calls(SDL_memset),
+					"Call count mismatch."
+				);
+			}
+
+			it("initializes the pool memory") {
+				IZ_PoolInitialize(&pool, POOL_MAX_SIZE);
+
+				check(
+					mock_is_called(SDL_malloc),
+					"Memory not allocated."
+				);
+			}
 		}
 
 		describe("PoolAllocate") {
+			static IZ_Pool pool;
+
+			after_each() {
+				IZ_PoolTeardown(&pool);
+			}
+
+			it("assigns contiguous memory") {
+				IZ_PoolInitialize(&pool, POOL_MAX_SIZE);
 
+				void* p1 = IZ_PoolAllocate(&pool, sizeof(struct DummyStruct), 0)->pointer;
+				void* p2 = IZ_PoolAllocate(&pool, sizeof(u8), 0)->pointer;
+
+				check(
+					p2 - p1 == sizeof(struct DummyStruct),
+					"Allocated memory mismatch."
+				);
+			}
+
+			it("ignores previously deallocated items") {
+				IZ_PoolInitialize(&pool, POOL_MAX_SIZE);
+
+				void* p1 = IZ_PoolAllocate(&pool, sizeof(struct DummyStruct), 0)->pointer;
+				void* p2 = IZ_PoolAllocate(&pool, sizeof(u8), 0)->pointer;
+				void* p3 = IZ_PoolAllocate(&pool, sizeof(u8), 0)->pointer;
+
+				IZ_PoolDeallocate(p2);
+
+				check(
+					p3 - p1 == sizeof(struct DummyStruct) + sizeof(u8),
+					"Allocated memory mismatch."
+				);
+			}
+
+			it("deallocates old items to make way for new ones when the memory is full") {
+				IZ_PoolInitialize(&pool, sizeof(u32));
+
+				IZ_PoolAllocate(&pool, sizeof(u16), 1);
+				IZ_PoolAllocate(&pool, sizeof(u8), 0);
+				IZ_PoolAllocate(&pool, sizeof(u8), 0);
+				IZ_PoolAllocate(&pool, sizeof(u8), 0);
+			}
 		}
 
-		describe("PoolDeallocate") {
+		describe("PoolDeallocate") {}
+
+		describe("PoolTeardown") {
+			static IZ_Pool pool;
+
+			before_each() {
+				IZ_PoolInitialize(&pool, POOL_MAX_SIZE);
+			}
+
+			after_each() {
+				mock_reset(SDL_free);
+			}
+
+			it("frees memory") {
+				IZ_PoolTeardown(&pool);
 
+				check(
+					mock_is_called(SDL_free),
+					"Memory not freed."
+				);
+			}
 		}
 	}
 }
diff --git a/src/packages/game/output/output.test.c b/src/packages/game/output/output.test.c
index 11ffa33..63a0029 100644
--- a/src/packages/game/output/output.test.c
+++ b/src/packages/game/output/output.test.c
@@ -5,7 +5,7 @@
 
 spec("output") {
 	describe("video") {
-		describe("VideoSaveConfig") {
+		describe("SaveConfig") {
 			static IZ_VideoConfig config;
 
 			after_each() {