In Level 17 there is a glitch where the zombie will virtually separate when the elevator pushes it through a ledge (i.e. zombie is in between lift and ledge and the lift slowly decapitates the zombie, but it doesn't die). Also the zombie sometimes doesn't die when the lift lifts it up to the spikes. A very fun game with clever solutions. Level 16 was a tad bit difficult to beat. I enjoyed the artwork of the game and the zombies most of all. There are still some things that need to be tweaked like the bat.