Good eye! Yes, with the right color settings, you can in fact see the little shaking heads. The update has them about 2-3 pixels shorter...I actually have a hard time getting a route with no zombies, and I know the super secret mechanics behind their placement...Acutally one hint, the left and right edge columns of cubes have no zombies. Otherwise its somewhat random. As mentioned in other posts, I have just finished my animations for my pulsating orbs and flailing ghosts, and bigger levels. Thanks for the feedback!