I'm always on the lookout for good platformers. It's even better when they happen to be puzzle games, too.
Continuity is awesome. So far, it hasn't been very difficult, but it doesn't matter. The execution is wonderful. All you must do is find a key and go through a door. The twist? The game boards play like those oldschool slid pictures, the ones you got as crappy party favors, how you had to slide the pieces around the grid to make the solid picture. You must slide the different "pieces" of the level around in order for your little stick-man to navigate his way to the key, then the door. It's a simple idea, beautiful in execution, and would--and does--make a great time waster.
Check it out if you have a few moments. These guys deserve some applause.