The goal of Springen, the latest physics puzzle on the block, is to get every red ball on the black ring, or at least as many as you need to progress to the next level. The majority of the puzzles require crafty feats of ball-flinging, and you'll have to learn to use some of the obstacles to your advantage if you hope to make it through all 30 levels of phuzzling goodness. The balls are heavier than they look, and when you add a wealth of bumpers, gravity wells, and other gizmos between you and the ending hoop, some of the puzzles test your luck as well.