http://icculus.org/neverball/

Neverball is an addictive little game where you must navigate a ball through a course with a time limit.  To move the ball, you must tilt the floor and the ball will roll appropriately.  It's a fun and challenging game that help kids develop their problem solving skills and hand-eye coordination. 

Neverputt builds on the engine of Neverball, and is a miniature golf game for one or more players.  This is more than just a putt-putt game though; it uses ramps, complex terrain, and even teleporters.

Both games make use of a sophisticated physics engine.  Hardware accelerated OpenGL is required. A 500MHz processor is recommended.

---