Hit detection on bubbles it wonky and it often doesn't feel like they're registering. sometimes they do but there's no feedback. Bubbles don't pulsate and make a popping sound (should only take 1/8th of a second, basically 200 microseconds really), and like Pattern Lock, not really much reason whihc is fine, some games don't need upgrades, unlocks or anything like that, but the per-run experience needs to be improved. clicking bubbles should be simple, fast and it should tell players When it happens.