Keyhack 1 next level.
Missing Circuits is a great and free physics based game. The game combined physics, puzzles along with cool strategy. This is a story of a small robot that was flying home. He was in a hurry, but unfortunately his rocket has crashed and all the parts were scattered across the planet inhabited by strange creatures. Our friend must get home fast so lets all help the little robot to fix his ship and fly away home! be aware, the game is highly addicting!