N-ball is a two-dimensional physics game released by Rag Doll Software in 2005. The game is divided into four different campaigns with a total of 40 levels. The central idea of the game is move the glowing ball to the finish plate. This is done by holding or tapping the space bar to make the ball jump, and directing the ball with the arrow keys. The player must also avoid hitting the red lines, which reset the level and cause the player to lose a life. Rag Doll Software also have many user created campaigns and levels for download on their site.