Drag number tile to the block on the grid, then, It will be merged into the sum of the two numbers. At least 3 same adjacent numbers will complete one merge.You have 5 number tiles in the start, Drag the right side number tile from the bottom tile bar area to any block on the grid. When the dragged tile meet the block on the board, numbers on the block will change to the sum of numbers on both blocks. Three or more adjacent blocks of the same number will trigger a triple-clear, and then merged to a new block with its number plus one. Upon each triple-clear, you will get a new tile to drag. You can hold up to 5 tiles to drag. When the number of bottom tiles drop to zero, the game is over.