Rubber Doodle

A physics puzzle where every line you draw becomes a rubber band. Stretch one between two pins, hook the ball into it and let go, and the ball leaves as fast as the band was tight. From there the level is a chain of slingshots: wrap a band around a peg to bend the shot, bounce off a wall, drop through a portal, and land in the cup. Saws, lasers and upside-down gravity arrive later. Seventy-five hand-drawn stages, and most of them have more than one answer.