@nothaseo, I haven't played that much to achieve a serious progress, I'd say the game is easy enough to stay interesting and motivating. Do not worry about balance, from what I've seen the game offers various aims to follow and gameplay progresses while player proceeds to new levels. Everything is slick and solid - the art, the sounds, the gameplay, well done indeed. I definitely will play it again. And yes, I've submitted my game here: http://www.newgrounds.com/portal/view/615818
Today I'll try to redesign ingame art so the game will look a little less ascetic.