In Leap Of Faith, you control Icarus, a green frog. In the game Icarus has access to a multitude of skills and abilities that he can use to Ascend the Wind Tunnel. 

In the Leap Of Faith Demo there are 18 collectable Items, including 2 Frog Skins. There are few differences between this demo and the official Leap Of Faith Beta and  Leap Of Faith Full Release. The main difference is the Leap Of Faith Demo ends once you reach the top of the Wind Tunnel (The first section of Leap Of Faith).