Algodoo

Now its aimable - shoot down 6 targets
Up & Down arrows to aim.
To shoot:
1. Cock the weapon by moveing the bolt handle backwards (to the left) - mag is allready loaded with 6 shells
2. Pull the trigger or use "Enter" key to shoot.
3. If the mag is empty, just slide new shells into the tube mag (6 shells capacity, and bolt doesn't have to be open).
4. In case of jamms, just cycle bolt manually.

Weapon has some problems with reliability (bolt likes to bounce a little while shooting, so wait untill it finally stops), so you know - be patient.
And You can also modify the shooting range if you want.