Really cool game! I like how it's a "Wonderboy" you play on. Nice touch with turning it on!
However, when I turned it off in the middle of playing, the game crashed I think.
I also noticed when playing that the best tactic was to just stand still and spam the shoot button. I think if you added a crouching function it would add a whole new layer to the game, so you can duck the bullets and fire low bullets. Also I think it would be more satisfying if I fired everytime I pressed the button.
I also don't really see that much about intentional bugs here, but maybe I'm missing something?
But really cool game though! I like this versus type game.