I remember seeing this in progress on the Discord! I used to be a middle school teacher who had to watch our version of detention a few times so this was slightly surreal. I loved just about everything about this game, though I wish the progression of pens was spaced out a bit more because I was able to snowball really quickly and there wasn't anything specific to shoot for after that except levelling up on the phone game forever, which isn't as involved if you have good towers. Really really great game!
Tapped out with 4 million points and 0 strikes!