Drag back from the red ball and let go to launch it like a slingshot into the bubbles.
Level 1 has 1 bubble, level 2 has 2, level 3 has 3 — and so on, forever. Clear every bubble on screen to finish the level, then take a breather before starting the next one.
Every bubble rings out its own in-key note when it pops — clear a level and hear the tune you just played, stitched back together. Bigger levels make for longer, livelier tunes.
Bubbles won't float forever: leave one too long (watch for the red pulse) and it drops to the ground and pops on its own, costing you -1. Leave a big one too long and it shatters into a swarm of tiny bubbles instead — and big bubbles get more common the higher your level.
Don't fall behind: if the bubbles ever fill the screen so the ball can't move, it's game over.
You popped 1 bubble.
The bubbles filled the screen.