Very beautiful, and I can't wait to get to the ending, but it looks like getting there will be a bit rough. The puzzle aspect is brilliant, but the platforming could use some work. Mainly, the jumping itself. Maybe if it was a bit more responsive, and had more of a momentum mechanic (i.e. pressing the opposite direction that you're jumping in slows the jump down instead of turning it around), the game could offer a much better experience. Oh, and make the tiles less slippery, it's annoying to feel like I just made a really hard jump by barely a pixel, only to slip down into a spike. Overall, I think this looks extremely promising, and I think you did a beautiful job!