Obey! The Game
This is a sequel to Mezzy Maze. It has many more features and as much of the game play is based on a physics engine, it can be played in a lot of different ways.
It is probably a little bit on the difficult side. The difficulty ramps up very quickly and the second half of the game has some devious puzzles. I wonder if anyone will be able to reach the end. It took me 15 minutes!