Try to guide the square to the exit using your ability to switch gravity.
WARNING: This game requires patience. Some levels will have you wanting to hurt me and everyone associated with me. If you get stuck in a level, feel free to ask for help at the game's homepage.
http://oh-mypixel.com/downloads/entry/9-Tetragon/
(You can also get the desktop version there)
Don't forget to always report errors!
Tested on:
HTC Desire
Sony Ericsson Xperia Mini
Scroll Extreme Tablet