2nd to Eds ramp and roll.  I dont have a trackball on my cab, but I grabbed my mouse hack track ball and gave the game a go on my desktop PC. 
Its actually really great and amazingly well done. plus when you click the image in ed's signature, the picture gets 4x as big, and I think thats hilarious.  I plan to make a bartop for spinners and trackball games, and if I do, ramp and roll will be on it.