How to play
Clear the marbles
Start with 48 marbles on a 7 × 7 board. Only the central cell is empty. No same-colour triple exists at the start. Make horizontal or vertical rows of at least three identical colours. They pop one by one, half a second apart. Diagonals do not count and no new marbles appear without a rainbow marble. The centre may be occupied temporarily while shifting and is kept free again after settling.
Ten fixed levels
Every player starts each level with exactly the same 48-marble arrangement and empty centre. Level 1 already uses all five colours and starts at roughly the previous level 5 difficulty. Later layouts require more preparation and planning ahead. All ten levels can be cleared completely; two rainbow marbles remain available. Choose a level in Settings or continue after finishing. Retrying a level always restores its identical layout. Competitions and rankings are not activated yet.
Select and shift
Drag a marble immediately with your finger, pen or mouse, or tap it first and then drag the selected marble. Drag horizontally or vertically and release: each gesture shifts the row exactly one cell. You can also use the enabled arrows below the board. All directly connected marbles ahead move together when a gap exists beyond them. Short, diagonal or blocked gestures do not count. Keyboard: Tab and Enter to select, arrow keys to shift.
Points and round completion
The first three marbles popped in a move each score 10 points. The fourth scores 20, the fifth 30, the sixth 40, the seventh 50 and the eighth 60 points. Each further marble scores 10 points more than the previous one. All cascades in the same move share this sequence. The next shift or rainbow marble starts again at 10 points. Undo also restores the previous score. After a popping sequence, an occupied centre is first freed by pushing its shortest neighbouring chain towards the nearest gap. Equal-length paths prefer up, down, left, then right. Remaining marbles then settle towards the centre in fixed order: top to bottom, bottom to top, left to right, right to left. Repeat until stable. The centre remains empty during settling; internal gaps close while empty outer areas remain outside. No random rearrangement. New matches trigger more popping. The next move becomes available only after the full cascade, which counts as one move. Clear as many of the 48 marbles as possible. The round ends with an empty board or when even the remaining rainbow marbles cannot make another triple. All ten fixed levels can be cleared completely. No time limit.
Two rainbow marbles
Two rainbow marbles containing all five colours sit beside the arrows. Tap one, then tap an empty board cell. No colour choice is needed: the marble automatically counts as any colour required by a horizontal or vertical match of three. Without a match it stays multicoloured on the board and keeps adapting when moved. Several matching lines may pop together; each marble counts only once. Placement counts as one move. Fill the last gap only with an immediate match. Tap the marble again or press Escape to cancel without spending it. Undo restores the board and rainbow marble; actual uses stay counted.
Undo
↶ takes back the last shift, including removed marbles. It remains available after a finished round: close the result to use it. Z also undoes a move. Undo uses are counted; active time continues. Up to 200 recent shifts are kept in memory for this open round.