Algodoo

This is a simple yet very powerful cannon, capable of firing
16 kilogram projectiles and upwards of 770 m/s with a
(recorded) maximum range of over 19955 meters!!

The controls are as followed:
Up arrow: Aim up
Down Arrow: Aim down
Enter: Fire
R: Reload

Note: To reload, you only need to tap the R key for a very
short amount of time, or else bad things will happen. If the
shell gets stuck, just lightly prod it into place with either the
drag tool or snappy taps of the R key

To restock the magazine, just copy/paste rounds into the empty
space, you can also pry the lid open on the mag and manuelly
insert rounds.