Really cool concept - combining a sliding tile game with a puzzle platformer is a fantastic idea and made exploration of the world really interesting. I like that entering each room reveals its layout on the grid, and the orthographic projection works better than I would have expected for communicating which room each tile represents. Also really liked the various tutorials and hints printed on scene elements in the background, made them mesh with the world really nicely. Super innovative, I dig it!
I think the angle of the camera in each room makes depth perception a bit tough for platforming on some occasions - kept bumping my head on various platforms while trying to figure out how far back Kiwi was; maybe a drop shadow/indicator on the ground would help with that?
The idea alone was super engaging, but the game had a nice layer of polish on top of that - great job!