You won't understand this. Don't try to understand this.
EDIT: Woah, its frame rate took a major kick to the balls for the internet. You'll probably have to turn down the quality.
Controls:
arrow keys: move
space bar: jump
down key: fire lasers (only during boss fights)
If you're having trouble beating something, right click then select forward. It'll send you to the next part of whatever level you're in.