Classic one player card game. Left mouse click on the skill level button you wish to play, either Easy, Not So Easy or Tricky. Then left click on the Start Dealing button to start. The game then generates the cards and deals them from the left pile to the right. When a pair is displayed you should then click on the SNAP button to call "Snap". This is shown by a Red "Snap" logo on the right of the screen. Be quick, the game will also call snap which is shown by a yellow "Snap" logo on the left.