EG Professor Bubble

Professor Bubble is the bubble shooter without additions. You fire a coloured ball into the cluster, three or more of a colour come away, and the score goes up. There is no campaign, no boosters and nothing to unlock.

Formats this bare rely entirely on the aiming problem, and it holds up because it always has: the shot that clears most and the shot that leaves you a workable cluster are usually different, and choosing between them is the game. Wall bounces extend that choice, since an angle you cannot hit directly is often reachable off the side.

Because the only measure is a score, sessions end when you decide they do. That makes it a reasonable board for a short break — there is nothing to abandon and nothing waiting for you tomorrow.

1. Check the colour of the ball you are firing.
2. Aim at a group of three or more of that colour.
3. Use the side walls to reach angles you cannot hit straight on.
4. Push the score as high as you can before the cluster reaches you.

Judge a shot by the shape it leaves behind, not only by the count it removes. With no boosters to rescue a bad cluster, position is your entire inventory — a tidy wall beats a spectacular clear that opens a hole you cannot aim into.