Aim by dragging anywhere on the field; the dotted guide follows your finger. Release to fire. A tap fires at the last aim. Release right on the cannon to cancel.

Match three or more of a colour to pop them. Anything left hanging from the ceiling drops for bonus points, doubled when five or more fall.

Swap the loaded bubble with the next one by tapping the next slot, pressing C or Shift, or the SWAP button. Once per shot.

Specials: a rainbow matches any colour, a bomb blasts everything within two rows, and stones only fall when nothing holds them.

The ceiling drops one row every few shots (fewer on harder tiers). If any bubble crosses the line above the cannon, the run ends. Chain popping shots for ×1.5, ×2 and ×3.

Modes: Campaign is 40 boards with a checkpoint every 5. Endless keeps loading boards with a faster ceiling. Daily is five seeded boards, one attempt. Puzzle gives every board a shot budget.

Keyboard: arrows aim, Space or ↑ fires, C swaps, Esc pauses. Gamepad: stick aims, A fires, B swaps.