The object of the game is to slide the puzzle pieces around until all robot parts are assembled into complete robots. You have found the solution when all robots are assembled.
In easier challenges you only need to make 1 or 2 robots. In more difficult challenges you need to complete up to 7 working robots. All challenges can be solved in 32 moves or less. The challenge booklet includes one possible solution for each challenge; note that easy challenges often have multiple correct solutions