realy well designed game the art style is great (i like pixel stuff) sure the main menu is blurry and allbut all in all great game ive only just started and i feel in love with it you sir are a realy great man keep up the good work cant wait to see your feauture games :)
Maybe you should add a material option like say metal, wood and others and acording to the material there would be diferent sounds like metal on metan it would have a spark evect and a kling sound. I do know that it is probably to difficult to do and it isn't realy needed in a game like this but it would be a nice detail.