You have eight skulls in total. To get the highest score possible in a level, use as few skulls as possible to fire at your enemies. Each level has replay value based on how many zombies you can kill. How many zombies can you kill with just one shot? What part of the fortress will fall apart if you hit this beam?

You can also try playing the more difficult mode if you want an even bigger challenge. This mode removes the targeting system used in Easy mode. That said, you don’t often know how many zombies are there in a level until you fire your first shot. This can complicate your strategies. To map out your level, you must fire a few stinkers.