Neverball is a nice game where you tilt the floor with your mouse. By tilting the floor you direct the ball towards a certain direction. There are lots of cool levels and they get harder as you play. A time limit is imposed so not only do you have to balance the ball but also watch your time. The game is very addictive and fun. Graphics are 3D and the physics are also pretty cool. Neverball works on Linux, Windows and Mac OS. Check out Neverball website here.