Catling Gun

Lots of mice are trying to devour your grain!
Fortunately, your cat is armed!
Do not let the mice devour your grain:
- Kill any approaching mouse using your machine gun
- Bullets do not travel instantly, so you have to predict where the mice will be
- Not all mice move the same way, throwing off your aim
- Any mouse which reaches the silo will eat your grain
- You lose when your silo is empty

How long can you last?