I attempted to make my Missile defence/ball vs square shooter into an arcade game with an Arudino-wired potentiometer and button to control and angle and firing of the gun, rather than MouseX and MouseY, which is was previously.
The most difficult thing is to figure out how to receive information Serially at any level of precision. It just seems so unpredictable. I have to open and close the p5.serialcontrol app, I need to unplug/replug the arduino. I need to mess around the finally it works — not ideal.