Make notes "blow up" and explode #4
Description
This one's gonna be a bit tricky, but basically when a note is played, it should fade in the corresponding color on the screen as it builds up and then burst into particles/colors when it enters the release phase.
We should add some sort of property on a square that determines how long it has been held down for and then sets up some visual callbacks based on that. We should also figure out how to determine when a synth is entering its release phase or otherwise hardcode in that information for this prototype.