Drag through empty space to paint rainbow liquid that turns into bubbles. Tap a large bubble to split it into a chain of little bubbles. Sweep through the little bubbles to pop them. Giant squish bubbles have four layers; boss bubbles take seven hits and trigger a cascading explosion. The dots on each giant show its remaining layers. Drag gently to stretch; a hard pull pops one layer or bursts an ordinary bubble. Bubble flow increases as you pop. Sound starts with your first tap or keypress. Use your device volume to adjust it. With a keyboard, use the arrow keys to choose a bubble and press Space or Enter to pop it; focus stays on a giant until its last layer bursts.