Earlier version(s) of Impale 5 shooting game:
Make the most out of your collection of zombie dummies. You can use them to switch off the red lights from the pointed objects. Use your mouse to control the cannon of rolling zombies.
Get rid of all the zombies. If you don't know how, you can always throw them into the spiky walls. At least, you can be sure that they will no longer be able to bother your peaceful town.