Amazing idea.
The only thing I can critique is that it is quite frustrating at times, but I managed to get to the end in the end :-) The reloading is fast so you immediately can try again and again and again, so I guess it is good to up your skills. :-)
The main character reminds me a bit of Days of the Tentacle. Very cute fellow. I especially like the detail of how he can climb those ledges when he only gets partly on top of the corner.