The game's concept is nice, but there is a little problem. When you get into fast matching, there are simply too many bubbles. Perhaps a way to not render all the bubbles, but a few or maybe make it so 1 bubble = X people? It gets very laggy and that slows down the overall performance of the game, hence why it takes forever to complete at least for myself.
Besides that, would be great for lower-end devices.
All in all, great work so far. Keep it up! I'm definitely looking forward to future updates!