great game but could be longer. for that you get 4 and 1/2 out of 5
Needs a little more work.
The idea and the game itself are good, but lack of sounds and music are the reasons why this game is not "very" good. Add them, and think about further developing this concept. Maybe add multiple boxes to control? Some optional points in air to collect? Zones with other-direction-gravity? Put some more effort in it and It will easily reach the frontpage.
simple concept yet very entertaining, i kinda wish there was a little ending or back story its really good gameplay but to short, also have you thought about adding music or sound fx?