Press the full screen button and then press the green flag twice. All of the levels are possible, but sometimes they can get pretty hard. Don't give up! You can use the up arrow, the space key, or the mouse to jump. Also, it's called zombie run, but all of the monsters are not zombies. Monsters: 1 -Zombie -No Power 2 -Fast Zombie power: speed 3 -Skeleton power: shoots fire streaks 4 -Fat Zombie power: is fat 5 -Ghost power: shoots from the sky 6 -Witch power: ?????