I like the idea, very creative use of the loop theme. The animations and sfx are nice as well, they make it feel sleek. I think that there could be some more emphasis on visualizing where the goal is, say maybe highlighting the goal area rather than it being gray. I got stuck in level 4 for not knowing where to roll the cube.
Edit: I didn't even realize that i could move the purple thing! Maybe some visual highlighting could help with that too, or maybe cube girl can give you a hint if you're stuck. Very cool still!