Rules & objective
A 4×4 board. Equal tiles merge and add the new tile's value to your score. Each tile merges at most once per move.
Controls
Swipe, use the direction buttons or arrow keys. Each tile merges at most once per move.
Worked example
A row of 2, 2, 4, blank becomes 4, 4, blank, blank when moved left. The new 4 does not merge again during that move.