I played through this game twice now. The first time I didn't get very far, and it was very difficult for me to set up any chain reactions. But I'm glad I came back to it; my second time through I had much better luck, and I had things set up to where most of the time I achieved my quota before even firing any shots. This was one of the more satisfying "chain reaction"s that I've seen so far once you get it going; the sound effects really help to sell the effect.
I ran into a few glitches with collision detection when going around the loop. Sometimes the ball got stuck behind the UI and was hard to find, and I wish there was some sort of indicator sound when you lose / when you get a new quota, and a button to restart would be nice. But those are all little quality-of-life things, nothing major. The game underlying things here was really fun. Great work!