Quote: "are those randomly expanding/contracting?"
no, they correspond to the amount of boxes you have in play(I figured it was the best incentive to clean up after yourself).
Quote: "Also I found having the source of the fire/gun barrel a bit annoying being fixed in one place, it basically meant the beam would only fall to the right as I can never get any projectile force on the left side."
I did a little experiment on that and found that it would be even harder to control if the place it fires from was moved.
Quote: "Making the source of the cannons/balls adjustable would make the game much better IMO"
I could put that into version 1.1 but you won't like it.
the answer to life the universe and everything = 42