In the Mystic Mine game player should guide his wagon through a mine collecting diamonds and gold. He can switchg rails with the mouse or keyboard to direct the wagon in right way. The wagon can only go down, but thanks to an optical illusion in the levels, it is always possible to reach every point. In fact, each level of the game consists of several endless staircases joined to each other.
The Mystic Mine game is still under development but you can see a video clip with several levels.
Information about the game was found at http://www.koonsolo.com/mysticmine/