Goal: Keep the board from filling up. Move one ball per turn onto any empty cell that has a clear path (through empty cells). After a non-clearing move, 3 new balls appear.
Lines mode: arrange 5+ same-color balls in a row, column, or diagonal to clear them.
Squares mode: also clears 2×2 blocks of the same color.
Blocks mode: clears any connected group of 7+ same-color balls.
Tips: Longer lines & combo clears score more. Watch the NEXT row to plan. Use Undo to take back a bad move. Build chains so a clear drops balls into another line!
Tap a ball to select (it glows), then tap an empty cell to move. Tap the selected ball again to deselect.