Introduce
Game point play button, select the game mode, and then select single or multiplayer modes, single:
and 
about the direction of control, 
accelerated. People can choose two, three, four games together, and games are played four games: play1: and about the direction of control, acceleration; play2: "," and "." About control direction, "?" acceleration; play3: 
and 
about the direction of control, 
key acceleration; play4: 
and 
about the direction of control, 
accelerated.