Let AI refactor everything and see if it breaks.

include/game_logic.h

@@ -0,0 +1,13 @@
+#ifndef GAME_LOGIC_H
+#define GAME_LOGIC_H
+
+#include "game_state.h"
+
+void update_snake(GameState &state);
+bool check_collision_self(GameState &state);
+bool check_collision_apples(GameState &state);
+bool check_collision_apples_rotten(GameState &state);
+void spawn_apples(GameState &state);
+void spawn_apples_rotten(GameState &state);
+
+#endif