very well done. this is definitely one of my favorites, as the gears and pipes are almost flawless. suprisingly, There's not a lot of lag for the amount of water. 10/10!
Yeah, actually they do. Phun doesn't have color sensors, so it would be impossible to make a color sorter without collision menus. at least, impossible if the balls were in any order.
The shells have to be killer otherwise the cannon won't fire because the shells are propelled forwards by the objects at the end (which have attraction applied to them). If they werent killer, then the shells would just get stuck at the end of the barrel (this problem could be solved if i could use thyme, but I don't know how )
the cannon is not meant to be used as a phunlet, jus for this scene.
As for it killing the ground, It does not do that on my computer so I do not know how to explain that.