ProjectGravity Firstly, I don't know what music you used, but it sounds amazing.
The game itself could be better. The controls aren't impossible to figure out like other people seem to think they are, but they aren't especially obvious either (for anyone wondering, just click the grey arrow). Regardless, clearer instructions would definitely help. Also descriptions of the power-ups. The heart adds health and pac-man lets you eat walls (not sure about this), but what is the shield supposed to do? The power-ups aren't easy to access during the game either since you have to click on them with the mouse, meaning you can't flip gravity, making you much more likely to die. Adding keyboard shortcuts (for all of the buttons) would make the power-ups a lot more accessible. Finally, not a big thing but the speed the gravity changes could be faster (you can get stuck behind walls and it's very annoying) and you can flip gravity in mid-air (intentional?).
Sorry for the massive block of text but I like where this game is going - it's just really hard to be good at for the wrong reasons at the moment. Keep going at it (I know it's only 2-3 months old :P).
Basic Mouse Puzzle 4 
Install_D