Blocks with various patterns are placed on a board. Tap one of two identical blocks to eliminate both if they are aligned horizontally or vertically with no other block between them.
If there is empty space, drag a block horizontally or vertically to align it with an identical block on an unobstructed line, then eliminate them. In-game items help adjust the layout.
Remove all blocks from the board to pass the level.
Slide patterned blocks into alignment and clear matching pairs.