It's short and sweet with a good variety of puzzle devices. I found it enjoyable to play and it has the potential to be extended with many more levels. I would happily play more levels of this even in its current form.
The visuals and sounds are pretty bare. There is room to make the game feel more engaging by adding audio feedback when hitting a wall or rotating the puzzle, having custom sprites instead of primitives, adding particle effects when you hit a spike, a "magical zoom" sound effect when you teleport, etc.
Good job on the clever level design.