Looks great, nice consistent visual style and smooth gameplay.
I got some lag when popping bubbles sometimes and it made me misclick my next projectile. But it's probably just the webGL build.
I'd like it if the 3 balls to choose from were not all randomized each shot, but just that the one you used is replaced by a random one. That would make planning ahead a part of the game (should I use the yellow one now or save it to clear some blue bubbles first so I can better reach it).
It's obviously missing sound and on completing the game it just goes on. But those are just the jam time constraints I guess.
Cool game!