Nearly perfect!
Innovative gameplay, hard (but beatable) difficulty, smashing people. With those three indicators for good games combined you have made a masterpiece! The artwork fits well and the story is entertaining and weird (that's a +) . Sadly, I can't rate the music as I currently don't have speakers.
I have only one point of (constructive) criticism: There should be a safe place, where the zappers cant hit you at the bottom, such that you can wait there after they got you once. It was really annoying to get zapped in the same moment the smash-thing could move again without the possibility to do anything against it.
And don't listen to the whiny kiddies. The game is hard, but beatable. I needed 2 tries and I am not really good at this kind of game.