Love the art for the cubes. Sound is also really well implemented. I would say this is one of the most commercially viable submissions I've seen.
If I was to offer any criticisms, it would be that the puzzle mechanics themselves are mostly familiar/derivative (although I understand that is often necessary given the time constraints), and I'm not sure I got how the game fits the 'one time use' theme (probably just me!).
All in all, excellent!!! Well done! :)