Sixteen Easy Pieces

I don't know if you can make a puzzle game much better than this. It's infuriating in the best way possible. Much like the title suggests, it looks easy, but has many surprises, all of them highly original, utilizing only built in objects. Each little box is a puzzle that forms part of the larger puzzle. Often you must be careful as to what state you leave a box in, since you might have to traverse it again, sometimes from a different direction. There's so much crammed into one board it is overwhelming. Since the boards wraparound, you will have to do some mental gymnastics to plan your next move. Save often, in multiple files.

Creative, highly addictive, and unquestionably cool.