diff --git a/code/.vscode/launch.json b/code/.vscode/launch.json
new file mode 100644
index 0000000..407f136
--- /dev/null
+++ b/code/.vscode/launch.json
@@ -0,0 +1,24 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Debug 'main.c' Project",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/../build/ldebug",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ],
+            "preLaunchTask": "Build" 
+        }
+    ]
+}
diff --git a/code/.vscode/tasks.json b/code/.vscode/tasks.json
new file mode 100644
index 0000000..b17da5a
--- /dev/null
+++ b/code/.vscode/tasks.json
@@ -0,0 +1,20 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Build",
+            "type": "shell",
+            "command": "/home/matt/Repos/ld58/linux",
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "presentation": {
+                "reveal": "never"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ]
+        }
+    ]
+}
diff --git a/code/core/platform.h b/code/core/platform.h
index a6cbda1..5047a9f 100644
--- a/code/core/platform.h
+++ b/code/core/platform.h
@@ -71,6 +71,8 @@
 	#pragma warning(disable : 4201)
 #elif OS_LINUX
 	#include <dlfcn.h>
+	#include <sys/mman.h>
+	#include <unistd.h>
 #endif
 
 #endif  // LD_CORE_PLATFORM_H_
diff --git a/code/core/types.h b/code/core/types.h
index 73f2a4d..cf33cd6 100644
--- a/code/core/types.h
+++ b/code/core/types.h
@@ -29,6 +29,18 @@ struct Str8 {
 	U8 *data;
 };
 
+typedef struct V2f V2f;
+struct V2f {
+  F32 x;
+  F32 y;
+};
+
+typedef struct V2i V2i;
+struct V2i {
+  U32 x;
+  U32 y;
+};
+
 #define U8_MAX  ((U8)  -1)
 #define U16_MAX ((U16) -1)
 #define U32_MAX ((U32) -1)
diff --git a/code/first.c b/code/first.c
index 6b8cd35..549af0b 100644
--- a/code/first.c
+++ b/code/first.c
@@ -6,23 +6,25 @@
 #include <stb_image.h>
 
 #include "core/core.h"
+#include "core/types.h"
 #include "os/core.h"
 
 #include "vulkan/core.h"
-
 #include "game/core.h"
 
 int main(int argc, char **argv) {
 	(void) argc;
 	(void) argv;
 
-	if (!SDL_Init(SDL_INIT_VIDEO)) {
+	if (!SDL_Init(SDL_INIT_VIDEO))
+	{
 		printf("[Error] :: Failed to initialise SDL3 (%s)\n", SDL_GetError());
 		return 1;
 	}
 
 	SDL_Window *window = SDL_CreateWindow("Ludum", 1280, 720, SDL_WINDOW_HIGH_PIXEL_DENSITY);
-	if (!window) {
+	if (!window)
+	{
 		printf("[Error] :: Failed to create window (%s)\n", SDL_GetError());
 		return 1;
 	}
@@ -58,12 +60,22 @@ int main(int argc, char **argv) {
 	}
 
 	bool running = true;
-	while (running) {
+	Player player;
+	player.pos.x = 0;
+	player.pos.y = 0;
+	while (running)
+	{
 		SDL_Event e;
-		while (SDL_PollEvent(&e)) {
-			if (e.type == SDL_EVENT_QUIT) { running = false; }
+		while (SDL_PollEvent(&e))
+		{
+			PlayerUpdate(&e, &player);
+			if (e.type == SDL_EVENT_QUIT)
+			{
+				running = false;
+			}
 		}
 
+
 		int w, h;
 		SDL_GetWindowSizeInPixels(window, &w, &h);
 
@@ -76,20 +88,20 @@ int main(int argc, char **argv) {
 		clear_colour.color.float32[2] = 0.0f;
 		clear_colour.color.float32[3] = 1.0f;
 
-		VkRenderingAttachmentInfo colour_attachment = { 0 };
-		colour_attachment.sType       = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO;
-		colour_attachment.imageView   = vk.swapchain.views[frame->image];
+		VkRenderingAttachmentInfo colour_attachment = {0};
+		colour_attachment.sType = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO;
+		colour_attachment.imageView = vk.swapchain.views[frame->image];
 		colour_attachment.imageLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
-		colour_attachment.loadOp      = VK_ATTACHMENT_LOAD_OP_CLEAR;
-		colour_attachment.storeOp     = VK_ATTACHMENT_STORE_OP_STORE;
-		colour_attachment.clearValue  = clear_colour;
+		colour_attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
+		colour_attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
+		colour_attachment.clearValue = clear_colour;
 
-		VkRenderingInfo rendering_info = { 0 };
-		rendering_info.sType                = VK_STRUCTURE_TYPE_RENDERING_INFO;
-		rendering_info.renderArea           = (VkRect2D) { 0, 0, w, h };
-		rendering_info.layerCount           = 1;
+		VkRenderingInfo rendering_info = {0};
+		rendering_info.sType = VK_STRUCTURE_TYPE_RENDERING_INFO;
+		rendering_info.renderArea = (VkRect2D){0, 0, w, h};
+		rendering_info.layerCount = 1;
 		rendering_info.colorAttachmentCount = 1;
-		rendering_info.pColorAttachments    = &colour_attachment;
+		rendering_info.pColorAttachments = &colour_attachment;
 
 		vk.CmdBeginRendering(cmd, &rendering_info);
 
@@ -148,6 +160,7 @@ int main(int argc, char **argv) {
 
 		vk.CmdEndRendering(cmd);
 
+
 		Vk_FrameEnd();
 	}
 
diff --git a/code/game/aabb.h b/code/game/aabb.h
new file mode 100644
index 0000000..9e78752
--- /dev/null
+++ b/code/game/aabb.h
@@ -0,0 +1,18 @@
+#if !defined(LD_GAME_AABB_H_)
+#define LD_GAME_AABB_H_
+
+#include "../core/types.h"
+#include "../core/macros.h"
+
+
+typedef struct AABB AABB;
+struct AABB {
+  V2f pos;
+  V2f size;
+};
+
+
+function bool AABB_Collide(AABB a, AABB b);
+function bool AABB_Point(AABB a, V2f v);
+
+#endif  // LD_GAME_AABB_H_
diff --git a/code/game/core.c b/code/game/core.c
index 7caf30e..61840c7 100644
--- a/code/game/core.c
+++ b/code/game/core.c
@@ -1,4 +1,3 @@
-
 void G_ImagesLoad(G_State *game) {
 	M_TempScope(0, 0) {
 		FS_List assets = FS_PathList(temp.arena, S("assets"));
@@ -193,3 +192,7 @@ void G_PipelinesLoad(G_State *game) {
 
 	Vk_PipelineCreate(basic);
 }
+
+#include "impl/aabb.c"
+#include "impl/nav.c"
+#include "impl/player.c"
diff --git a/code/game/core.h b/code/game/core.h
index 37df55b..70f4fa6 100644
--- a/code/game/core.h
+++ b/code/game/core.h
@@ -31,4 +31,10 @@ struct G_State {
 function void G_ImagesLoad(G_State *game);
 function void G_PipelinesLoad(G_State *game);
 
+#include "aabb.h"
+#include "player.h"
+#include "nav.h"
+#include "npc.h"
+#include "world.h"
+
 #endif  // LD_GAME_CORE_H_
diff --git a/code/game/impl/aabb.c b/code/game/impl/aabb.c
new file mode 100644
index 0000000..c1d1fba
--- /dev/null
+++ b/code/game/impl/aabb.c
@@ -0,0 +1,15 @@
+#include "game/aabb.h"
+#include "core/types.h"
+
+bool AABB_Collide(AABB a, AABB b) {
+  bool collision_x = a.pos.x + a.size.x >= b.pos.x && b.pos.x + b.size.x >= a.pos.x;
+  bool collision_y = a.pos.y + a.size.x >= b.pos.y && b.pos.y + b.size.y >= a.pos.y;
+  return collision_x && collision_y;
+}
+
+bool AABB_Point(AABB a, V2f v) {
+  bool collision_x = a.pos.x + a.size.x >= v.x && a.pos.x <= v.x;
+  bool collision_y = a.pos.x + a.size.y >= v.y && a.pos.y <= v.y;
+  return collision_x && collision_y;
+}
+
diff --git a/code/game/impl/nav.c b/code/game/impl/nav.c
new file mode 100644
index 0000000..96f78ae
--- /dev/null
+++ b/code/game/impl/nav.c
@@ -0,0 +1,101 @@
+#include "game/nav.h"
+#include "core/types.h"
+
+#include <stdio.h>
+
+#define MAX_UNFINISHED 128
+
+typedef struct navSearchNodeState navSearchNodeState;
+struct navSearchNodeState{
+  bool visited;
+  U64 distance;
+  U32 shortest;
+  bool addedToUnvisited;
+};
+
+typedef struct navSearchState navSearchState;
+struct navSearchState{
+  navSearchNodeState nodeStates[NAV_MAX_NODES];
+};
+
+navSearchState initState(U32 start, U32 meshSize) {
+  navSearchState state = {};
+  for(U32 i = 0; i < meshSize; i++) {
+    state.nodeStates[i].visited = false;
+    state.nodeStates[i].addedToUnvisited = false;
+    // underflow to the max :)
+    state.nodeStates[i].distance = U64_MAX;
+    state.nodeStates[i].shortest = 0;
+  }
+  state.nodeStates[start].distance = 0;
+  return state;
+}
+
+U32 getLowestState(U32 unfinishedIndexes[128], U32 unfinishedCount, navSearchState state, U32 *offset) {
+  U32 lowest  = U32_MAX;
+  U32 lowestI = U32_MAX;
+  bool startFound = false;
+  for(U32 i = *offset; i < unfinishedCount; i++) {
+    navSearchNodeState checkNode = state.nodeStates[unfinishedIndexes[i]];
+    if(checkNode.visited) {
+      if(!startFound) {
+        *offset = i;
+      }
+      continue;
+    }
+    startFound = true;
+    if (lowest > checkNode.distance) {
+      lowest  = cast(U32) checkNode.distance;
+      lowestI = unfinishedIndexes[i];
+    }
+  }
+  return lowestI;
+}
+
+// Generate a path to follow between the start and end node.
+NavPath Nav_Path(NavMesh mesh, U32 start, U32 end) {
+  navSearchState state = initState(start, mesh.nodeCount);
+  U32 unfinishedCount = 1;
+  U32 unfinishedIndexes[NAV_MAX_NODES] = {start};
+  // I don't want to spend time removing items from
+  // the unfinished nodes, so when checking for a lowest
+  // if I find the first N items have been checked, I'll mark
+  // an offset to skip the first N items.
+  U32 unfinishedOffset = 0;
+  U32 lowestNodeIndex = start;
+  bool found = false;
+  while(!found) {
+    for(int connectionI = 0 ; connectionI < mesh.nodes[lowestNodeIndex].connectionCount; connectionI++) {
+      NavConnection connection = mesh.nodes[lowestNodeIndex].connections[connectionI];
+      navSearchNodeState *testNode = &state.nodeStates[connection.NodeIndex];
+      if(testNode->visited) {continue;}
+      U32 distance = cast(U32) (state.nodeStates[lowestNodeIndex].distance + connection.Cost);
+      distance += cast(U32) (mesh.nodes[end].pos.x - mesh.nodes[connection.NodeIndex].pos.x);
+      distance += cast(U32) (mesh.nodes[end].pos.y - mesh.nodes[connection.NodeIndex].pos.y);
+      if(testNode->distance > distance) {
+        testNode->distance = distance;
+        testNode->shortest = lowestNodeIndex;
+      }
+      if(!testNode->addedToUnvisited) {
+        unfinishedIndexes[unfinishedCount] = connection.NodeIndex;
+        unfinishedCount++;
+        testNode->addedToUnvisited = true;
+      }
+    }
+    state.nodeStates[lowestNodeIndex].visited = true;
+    lowestNodeIndex = getLowestState(unfinishedIndexes, unfinishedCount, state, &unfinishedOffset);
+    if(lowestNodeIndex == end) {
+      found = true;
+    }
+  }
+  NavPath res_path = {0};
+  U32 index = end;
+  while(index!=start) {
+    res_path.indexes[res_path.nodeCount] = index;
+    res_path.nodeCount++;
+    index = state.nodeStates[index].shortest;
+  }
+  res_path.indexes[res_path.nodeCount] = start;
+  res_path.nodeCount++;
+  return res_path;
+}
diff --git a/code/game/impl/player.c b/code/game/impl/player.c
new file mode 100644
index 0000000..4c26667
--- /dev/null
+++ b/code/game/impl/player.c
@@ -0,0 +1,22 @@
+#include "../player.h"
+
+void PlayerUpdate(SDL_Event *event, Player *player)
+{
+    SDL_KeyboardEvent key = event->key;
+    if (key.key == SDLK_W)
+    {
+        player->pos.y += 10;
+    }
+    if (key.key == SDLK_A)
+    {
+        player->pos.x -= 10;
+    }
+    if (key.key == SDLK_D)
+    {
+        player->pos.x += 10;
+    }
+    if (key.key == SDLK_S)
+    {
+        player->pos.y -= 10;
+    }
+}
diff --git a/code/game/nav.h b/code/game/nav.h
new file mode 100644
index 0000000..b407c26
--- /dev/null
+++ b/code/game/nav.h
@@ -0,0 +1,40 @@
+#if !defined(LD_GAME_NAV_H_)
+#define LD_GAME_NAV_H_
+
+#include "core/types.h"
+#include "core/macros.h"
+
+#define NAV_MAX_PATH 1024
+#define NAV_MAX_CONNECTIONS 8
+#define NAV_MAX_NODES 4096
+
+typedef struct NavNode NavNode;
+
+typedef struct NavConnection NavConnection;
+struct NavConnection{
+  F32 Cost;
+  U32 NodeIndex;
+};
+
+struct NavNode {
+  V2f pos;
+  U8 connectionCount;
+  NavConnection connections[NAV_MAX_CONNECTIONS];
+};
+
+typedef struct NavPath NavPath;
+struct NavPath {
+  U32 nodeCount;
+  U32 indexes[NAV_MAX_PATH];
+};
+
+typedef struct NavMesh NavMesh;
+struct NavMesh{
+  U32 nodeCount;
+  NavNode nodes[NAV_MAX_NODES];
+};
+
+
+function NavPath Nav_Path(NavMesh mesh, U32 start, U32 end);
+
+#endif
diff --git a/code/game/npc.h b/code/game/npc.h
new file mode 100644
index 0000000..a50868a
--- /dev/null
+++ b/code/game/npc.h
@@ -0,0 +1,10 @@
+#if !defined(LD_GAME_NPC_H_)
+#define LD_GAME_NPC_H_
+#include "aabb.h"
+
+typedef struct NPC NPC;
+struct NPC {
+  AABB collision;
+};
+
+#endif  // LD_GAME_NPC_H_
diff --git a/code/game/player.h b/code/game/player.h
new file mode 100644
index 0000000..8067026
--- /dev/null
+++ b/code/game/player.h
@@ -0,0 +1,17 @@
+#if !defined(LD_GAME_PLAYER_H_)
+#define LD_GAME_PLAYER_H_
+
+#include "../core/types.h"
+#include "../core/macros.h"
+
+#include <SDL3/SDL_events.h>
+
+typedef struct Player Player;
+struct Player
+{
+    V2f pos;
+};
+
+function void PlayerUpdate(SDL_Event *event, Player *player);
+
+#endif  // LD_GAME_PLAYER_H_
diff --git a/code/game/world.h b/code/game/world.h
new file mode 100644
index 0000000..7b75092
--- /dev/null
+++ b/code/game/world.h
@@ -0,0 +1,10 @@
+#if !defined(LD_GAME_WORLD_H_)
+#define LD_GAME_WORLD_H_
+
+typedef struct World World;
+struct World {
+  NPC npcs[128];
+  U32 npcCount;
+};
+
+#endif  // LD_GAME_WORLD_H_
diff --git a/code/os/core.c b/code/os/core.c
index 15ce626..dd739ff 100644
--- a/code/os/core.c
+++ b/code/os/core.c
@@ -1,5 +1,7 @@
 #if OS_WINDOWS
 	#include "impl/windows/core.c"
+#elif OS_LINUX
+	#include "impl/linux/core.c"
 #endif
 
 
diff --git a/code/os/impl/linux/core.c b/code/os/impl/linux/core.c
new file mode 100644
index 0000000..1dd1cd9
--- /dev/null
+++ b/code/os/impl/linux/core.c
@@ -0,0 +1,31 @@
+U64 VM_PageSize() {
+	U64 result = getpagesize();
+	return result;
+}
+
+U64 VM_AllocationGranularity() {
+	U64 result = getpagesize();
+	return result;
+}
+
+void *VM_Reserve(U64 size) {
+	void *addr = mmap(0, size, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0);
+
+	void *result = (addr == MAP_FAILED) ? 0 : addr;
+	return result;
+}
+
+B32 VM_Commit(void *base, U64 size) {
+	B32 result = mprotect(base, size, PROT_READ | PROT_WRITE) == 0;
+	return result;
+}
+
+void VM_Decommit(void *base, U64 size) {
+	mprotect(base, size, PROT_NONE);
+}
+
+void VM_Release(void *base, U64 size) {
+	munmap(base, size);
+}
+
+
diff --git a/linux b/linux
index b44be73..2930c89 100755
--- a/linux
+++ b/linux
@@ -37,7 +37,7 @@ fi
 
 echo "[Building source]"
 
-COMPILER_OPTS="-Wall -Wno-missing-braces -I'deps/stb'"
+COMPILER_OPTS="-Wall -Wno-missing-braces -Wno-unused-function -I'deps/stb'"
 LINKER_OPTS="-lSDL3"
 
 if [[ $release == 1 ]]
diff --git a/windows.bat b/windows.bat
index e1b3c00..2e578cf 100644
--- a/windows.bat
+++ b/windows.bat
@@ -67,7 +67,7 @@ glslangValidator -o "assets\shaders\basic.frag.spv" --target-env vulkan1.3 "..\c
 
 ECHO [Building source]
 
-SET COMPILER_OPTS=-nologo -W4 -I"deps\SDL3\include" -I"deps\stb" -I"%VULKAN_SDK%\Include"
+SET COMPILER_OPTS=-nologo -W4 -I"deps\SDL3\include" -I"deps\stb" -I"%VULKAN_SDK%\Include" -I"..\code"
 SET LINKER_OPTS=-LIBPATH:"deps\SDL3\lib" SDL3.lib
 
 IF %release% equ 1 (