Random Puzzles
To make the contraptions random automatically in Play Mode, complete all the puzzles in Tutorial (Training), Easy, Medium (Normal), Advanced (Hard) and Expert (Very Hard). To make the contraptions random in VS Mode, complete all 50 VS puzzles.
Contraptions Chosen Random - Complete all puzzles in all 5 levels.
Contraptions Chosen Random in VS Mode - Complete all 50 VS puzzles in VS Mode, no matter whoever wins.