well....
this game is too easy. you can win a level by just clicking and hoping. and if all the red blocks fall of you can't restart so you have to restart your browser. also i could complete this game without thinking and that's not very good for a game. so to make it better you should give penalties that are bigger then just a few points for losing red blocks, de sign the levels better and add a restart button. there are also a lot of these games so try making something else or add something unique. but it was a little enjoyable.