I made something really similar! I took a bit more of an aim trainer approach, but I like the strategy and target prioritisation that comes from popping the bubbles before they merge. I had no trouble understanding the game immdiately, which is great. The music was nice and relaxing too. If I had to make a suggestion, I would look at potentially adding a difficulty increase as the game progresses, it's a tiny bit easy. Second, polish like particle effects etc. always make a game pop. Great job!