nice, really nice.
good visuals, they fit well, and they blend extremely well with the theme of the game. great work.
couldn't find many thins to point on, other than that, the cube sometimes rotates on its own. and it is also a nice touch, that the platforms, when you jump on them, you do remain moving, relative to their position, as opposed to reality, where if something is moving, and you jump vertical, well, you'd fall :D.
it was a nice unrealistic addition. that made the game easier, and nicer to play. good work.