I like the momentum based movement, it feels very smooth. The game is easy to understand, fits quite well with the theme, and is fun to play. The game looks good visually, however i wish that there was more sound. I like that you added in some smaller details like how there is a timer on the top-right of the screen.
however, i wish the levels were a bit easier because there is a sudden difficulty curve (for e.g. it took me minutes in order for me to jump the gap near the beginning, or to throw the cube through the small gap in order to direct it through the glass).
The elevator is quite buggy (for instance, i got stuck in the elevator when i wanted to go up but when i deactivated it, i managed to clip out of the map somehow)
But other then that, great submission!