I can only say one thing for a possible update to the game. Make it a little bit more regular whether the zombies latch onto the hood or not. Too many times I have had a Brute get run over and then a common zombie latch on, both at the same speed.
Just so people know, the developer is expecting to have Creeper World 3 finished sometime in October. Price unknown; my guess would be $20-25, but again, that's a guess. I have no direct contact with the developer at all. The October release was stated on his blog.
Awesome game. Ending song is of the same caliber as the on on http://www.kongregate.com/games/Mazapan/you-have-to-burn-the-rope . And that says a lot lol. I'm gonna find a way to get this ending song as a ring-tone now...
its a % chance based on your speed.