# Bottom Functions
- Up arrow: Undo the last operation and retract the tile picked most recently;
- Left curved arrow: Reverse all previous actions;
- Double circular arrow: Randomly reshuffle all tiles on the board and rearrange the patterns.
# Core Gameplay Rules
1. Basic elimination rule: Tap patterned tiles on the board, and the tiles will move into the bottom slot bar. Once three identical patterns are collected in the slot bar, the three tiles will be eliminated automatically.
2. Clearance requirement: Clear all tiles from the board to beat the level and unlock the next stage. Higher-numbered levels feature more tiles and more intricate layouts, raising the difficulty progressively.
3. Failure condition: If the bottom storage slot bar is completely full with no remaining space, and no combinations of three matching patterns can be formed, the game ends immediately, and the Game Over screen pops up.