Goddamn these egg revolutionaries. I was doing well until the Kinged eggs stopped disappearing, I think its a bug. Also personally id like it if the cannon fired faster.
Anyway, sweet unique idea and i dig the little details :)
Hopefully the bug you ran into has been fixed in a patch I uploaded after I read your comment. As far as the cannon firing faster, that is a definite option in the balancing puzzle, but many things could/should be tweaked to make the game more fun and fair.
Thanks for playing and thanks for the bug report!