Lost Ball,is a casual game with 2D graphics designed for smart phones. In this game, the player must take a round shaped robot up the shelves of a library. Though the mechanics of the game are complicated, learning them is very easy. There arelots of barriers across the path that make itdifficult to reach the main destination. Alsothe player will challenge various mechanics such as portals or sound-waves in thegame. There are 2 modes in this game; the first one includes the main story levels, and the second one is the endless mode. .