The first time i was like “what is going on here?”, being thrown into some random cubes like that. It took a little for me to understand that these “random cubes” are the notes being played….
I liked a lot how i can sacrifice some points to keep, or regain, my position with the gravity reversal.
Just like CriztiUit said, i also feared that the song would go on forever, so i second the idea of a progress bar or something like that.
Very well done.