Aim and shoot bubbles to match 3 or more of the same color. Pop them all before the wall reaches the bottom.
A grid of colored bubbles sits at the top. You shoot from the bottom.
Tap anywhere above the launcher to aim — the dotted line shows the path. Release (or tap) to fire. The bubble bounces off the side walls.
When a fired bubble touches the cluster, it snaps to the nearest empty cell. If it forms a group of 3+ same-color neighbors, the whole group pops. Any bubbles no longer connected to the ceiling fall too.
Every 6 shots a new row drops in from the top. If a bubble reaches the bottom line, it's game over.
Scoring: 10 per popped, 20 per dropped, 500 bonus for clearing the board.
The wall is always creeping down, so think in terms of removing whole columns of support, not just popping the bubble in front of you. The most powerful shots are the ones that disconnect a big clump from the ceiling — clear the bubbles holding a cluster up and everything below falls for bonus points, which clears far more than a simple three-match.
Use the side walls deliberately: a bank shot can tuck a bubble into a gap that a straight line could never reach, so aim at the wall when the colour you need is hiding behind an overhang. Watch your shot counter, because a new row drops every six shots, and spend a wasted-looking shot to set up a big chain rather than firing blindly. When several colours are options, clear from the sides and downward to keep the ceiling line high and buy yourself more time.