Algodoo

So this is my first practical and fully functional cannon. It should work reliably most of the time. It is kinda inaccurate.

1. Put a cartridge in the breech and push it in till it closes, it should close automatically.
2. Press ENTER to shoot. The shell ejects automatically. If it won't eject by itself or you don't want to fire the cartridge, press UP.
3. Look at the zombie explode (credit goes to KRANE for his awesome zombie target!)