ZOMBIEGRINDER 60000 is an online flash game where you play a fat guy in suspenders who is armed with a shotgun and must shoot zombies and jump over obstacles. The game moves fast, and it’s harder than you think it will be. The goal is to stay alive as many seconds as you can.
ZOMBIEGRINDER has been around for a few years, and there are a number of sites hosting it that seem to have broken versions. This version, however, appears to be working just fine.
ScottKenemore.com 
Wow, I only lasted 22 seconds my first time! It’s a cool game, but I think it would take me a while to get good at it.