Algodoo

The Medieval Siege Cannon.
Press 'j' to toggle breaking the cannon wheels
Press 'q' or 'z' to raise or lower the cannon elevation respectively.
Press '1' or '2' to move the cannon forward or backward respectively.

Procedure to loading the Cannon:
1. Load the Gunpowder Package into the cannon, with the round side facing away from the cannon.
2. Ram it with the ramming rod.
3. Load the projectile of your choice.
4. Repeat step 2.
5. Fire by pulling the string at the back.

Proven to have a range of about 700 m and a top speed of about 150m/s at highest cannon angle elevation.