Pretty good game. I like the art style and the music fits the comical nature of the game. The story was quite funny,
It's like Paperboy but with brains.
I think reducing the traffic would be good too, but introduce other hazards, things to get in the way of the brain when youre tossing it, maybe it lands in a bin and the Zombie Mayor gets upside because youre delivering dirty brains.
It would be great to see this expanded upon with many more ideas.
Great work.