move platformes and scenery to /apps/demos/

apps/demos/platformer/state.h

@@ -0,0 +1,20 @@
+#ifndef STATE_H
+#define STATE_H
+
+
+#include "twn_game_api.h"
+
+#include <stdbool.h>
+
+
+typedef struct Scene Scene;
+
+typedef struct State {
+    Context *ctx;
+    Scene *scene;
+    Scene *next_scene;
+    bool is_scene_switching;
+} State;
+
+
+#endif