diff --git a/Makefile b/Makefile
index cc7b8d49d1c729aa4de759b8bb370ab19ec7340a..c31d5f51776b6c9f923a7355ba605f724ebb1836 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ CFLAGS     := -std=c99 -Wall -Wextra -ggdb
 LDFLAGS    := -lm
 SYSTEM     := $(shell uname -s)
 
-SOURCES    := main.c ppm.c
+SOURCES    := main.c ppm.c keyboard.c mouse.c
 
 ifeq ($(SYSTEM), Linux)
     LDFLAGS += -lGL -lglut
diff --git a/all.h b/all.h
index 2ae5e7b23038501d1eb1a987189efe268230d008..ddb628655e1c8108c9e4d889670301c40cde7eb6 100644
--- a/all.h
+++ b/all.h
@@ -1,6 +1,22 @@
 #ifndef ALL_H
 #define ALL_H
 
+#include <stdio.h>
+#include <stdlib.h>
+
+#define GL_SILENCE_DEPRECATION
+#ifdef __APPLE__
+    #include <OpenGL/gl.h>
+    #include <GLUT/glut.h>
+#else
+    #include <GL/gl.h>
+    #include <GL/glut.h>
+#endif
+
+#ifndef M_PI
+	#define M_PI 3.14159265358979323846
+#endif
+
 typedef struct {
 	float x, y, z;
 } Vec2;
@@ -21,6 +37,20 @@ 	int color_space;
 	unsigned char *pixels;
 } Image;
 
+typedef struct {
+	int target_fps;
+	int width;
+	int height;
+	int last_time;
+
+	float x_offset;
+	float y_offset;
+	float cube_angle;
+	GLuint texture_id;
+} Game;
+
+extern Game game;
+
 #define COLOR_RED     (Vec3){ .x = 1.0f, .y = 0.0f, .z = 0.0f }
 #define COLOR_GREEN   (Vec3){ .x = 0.0f, .y = 1.0f, .z = 0.0f }
 #define COLOR_BLUE    (Vec3){ .x = 0.0f, .y = 0.0f, .z = 1.0f }
@@ -33,5 +63,8 @@ #define COLOR_ORANGE  (Vec3){ .x = 1.0f, .y = 0.5f, .z = 0.0f }
 #define COLOR_PURPLE  (Vec3){ .x = 0.5f, .y = 0.0f, .z = 0.5f }
 
 Image read_ppm_image(const char *filename);
+
+void handle_keyboard_event(unsigned char key, int x, int y);
+void handle_mouse_event(int button, int state, int x, int y);
 
 #endif
diff --git a/keyboard.c b/keyboard.c
new file mode 100644
index 0000000000000000000000000000000000000000..9e9377b399fc0f9be04eec007e5831dae6aa135c
--- /dev/null
+++ b/keyboard.c
@@ -0,0 +1,26 @@
+#include "all.h"
+
+void handle_keyboard_event(unsigned char key, int x, int y) {
+	(void)x; (void)y;
+	float fraction = 0.05f;
+
+	switch (key) {
+		case 27: exit(0); break;
+		case 'w': game.y_offset += fraction; break;
+		case 's': game.y_offset -= fraction; break;
+		case 'a': game.x_offset -= fraction; break;
+		case 'd': game.x_offset += fraction; break;
+		case '+':
+			game.target_fps += 5;
+			printf("Target FPS: %d\n", game.target_fps);
+			break;
+		case '-':
+			if (game.target_fps > 5) game.target_fps -= 5;
+			printf("Target FPS: %d\n", game.target_fps);
+			break;
+		default:
+			printf("Unknown key: %c\n", key);
+			break;
+	}
+}
+
diff --git a/main.c b/main.c
index 4d070acbbcfbc397563140bd69df13b0eb570f31..c9286229a669d0706cab1077cca552e573831840 100644
--- a/main.c
+++ b/main.c
@@ -14,19 +14,7 @@
 #define NONSTD_IMPLEMENTATION
 #include "nonstd.h"
 
-#define GL_SILENCE_DEPRECATION
-
-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-#ifdef __APPLE__
-    #include <OpenGL/gl.h>
-    #include <GLUT/glut.h>
-#else
-    #include <GL/gl.h>
-    #include <GL/glut.h>
-#endif
+Game game = {0};
 
 // A packed structure representing a single vertex.
 // The GPU needs to know the "stride" (size) of this struct to jump between vertices.
@@ -68,20 +56,6 @@         v.y*c + cross.y*s + y*dot*(1-c),
         v.z*c + cross.z*s + z*dot*(1-c)
     };
 }
-
-typedef struct {
-	int target_fps;
-	int width;
-	int height;
-	int last_time;
-
-	float x_offset;
-	float y_offset;
-	float cube_angle;
-	GLuint texture_id;
-} Game;
-
-Game game = {0};
 
 void init_texture(void) {
 	Image img = read_ppm_image("textures/test.ppm");
@@ -276,45 +250,6 @@ 	if (w >= h) {
 		glOrtho(0.5 - 0.5 * aspect, 0.5 + 0.5 * aspect, 0.0, 1.0, -1.0, 1.0);
 	} else {
 		glOrtho(0.0, 1.0, 0.5 - 0.5 / aspect, 0.5 + 0.5 / aspect, -1.0, 1.0);
-	}
-}
-
-void handle_mouse_event(int button, int state, int x, int y) {
-	switch (button) {
-		case GLUT_LEFT_BUTTON:
-			if (state == GLUT_DOWN) printf("Left button clicked (x: %d, y: %d)\n", x, y);
-			break;
-		case GLUT_MIDDLE_BUTTON:
-			if (state == GLUT_DOWN) printf("Middle button clicked (x: %d, y: %d)\n", x, y);
-			break;
-		case GLUT_RIGHT_BUTTON:
-			if (state == GLUT_DOWN) printf("Right button clicked (x: %d, y: %d)\n", x, y);
-			break;
-		default: break;
-	}
-}
-
-void handle_keyboard_event(unsigned char key, int x, int y) {
-	(void)x; (void)y;
-	float fraction = 0.05f;
-
-	switch (key) {
-		case 27: exit(0); break;
-		case 'w': game.y_offset += fraction; break;
-		case 's': game.y_offset -= fraction; break;
-		case 'a': game.x_offset -= fraction; break;
-		case 'd': game.x_offset += fraction; break;
-		case '+':
-			game.target_fps += 5;
-			printf("Target FPS: %d\n", game.target_fps);
-			break;
-		case '-':
-			if (game.target_fps > 5) game.target_fps -= 5;
-			printf("Target FPS: %d\n", game.target_fps);
-			break;
-		default:
-			printf("Unknown key: %c\n", key);
-			break;
 	}
 }
 
diff --git a/mouse.c b/mouse.c
new file mode 100644
index 0000000000000000000000000000000000000000..352dfbd1b72897c8bdeef2e3723b9463d5776020
--- /dev/null
+++ b/mouse.c
@@ -0,0 +1,17 @@
+#include "all.h"
+
+void handle_mouse_event(int button, int state, int x, int y) {
+	switch (button) {
+		case GLUT_LEFT_BUTTON:
+			if (state == GLUT_DOWN) printf("Left button clicked (x: %d, y: %d)\n", x, y);
+			break;
+		case GLUT_MIDDLE_BUTTON:
+			if (state == GLUT_DOWN) printf("Middle button clicked (x: %d, y: %d)\n", x, y);
+			break;
+		case GLUT_RIGHT_BUTTON:
+			if (state == GLUT_DOWN) printf("Right button clicked (x: %d, y: %d)\n", x, y);
+			break;
+		default: break;
+	}
+}
+