Really fun concept.
Made me realize I'd never survive because even after mapping out the entire cube on paper I still couldn't figure a way out... I'm just terrible at puzzles.
I would suggest adding a resolution setting to make the game playable on weaker hardware. My PC is weak so it ran at ~26fps average, but thankfully the game didn't require fast reactions so it didn't affect gameplay.
Definitely going to watch the movie this was based on.