Use the keyboard A, W, D, S or arrow keys Left, Up, Right, Down, and mouse button - if the game description "Dark Time Mahjong" is not stated otherwise.
Dark Time Mahjong
Description: Regular mahjong solitaire game with special time tiles. Combine the time tiles as fast as possible to get the most time extra. Use the special slow and stop tiles to either slow down the time on the tiles or to stop it.