To play this game, you must be outside. The aim of the game is to navigate your way though a virtual maze. Along the way you collect hidden coins and try to reach the exit before the timer expires. The GPS feature on your android device gives your location in the maze. You define the maze by pacing out the boundary of the playing area. You select each of the four corners of the maze by pressing the SET button on the setup screen. If you lose the GPS signal, the game pauses and the position display turns yellow. If you leave the maze boundary the position display turns red. Playing Air Cave is a fun fitness activity; you need to go outside and walk around to play the game. Please note, Air Cave does monitor your physical environment. It is your responsibility to play in a safe area.