There are 5 type of games: 301,501,cricket, round the clock and baseball. All the games can be played using 1 of 2 available control types flick or cross. With controltype flick you throw the dart using a flick movement of the dart. Controltype cross let’s you stop 2 moving bars that determine the horizontal and vertical position of the dart on the board.
The icons indicate which controltype you choose.
To play a 501 game with the moving bars as controls choose the icon with the yellow bars on it:
To play a 501 game with flick dart control choose the icon with the hand on it:
The same goes for all the other gametypes.