A very nice game! Pretty simply but effective theme interpretation. The only frustrating thing was that the non-controlled cube seems to have zero friction, so if you accidentally push it it just runs without stopping. The “Press R to restart” text that appeared after you move the first cube to the exit is a little misleading - like, I’ve almost finished the level, why would I restart now, did I do something wrong? Maybe I misinterpreted it, though. Anyways, cool job!