Love the art, theme, and tone. I also appreciate your decision to be about exploration and no combat, which makes it more enjoyable to just walk around and interact with everything. Can't wait to see more.
I think I ran into a bug in where I was able to get the upside-down-door to flip, but couldn't get into it. Also, I think the right-side-up door is supposed to appear locked at some point, but never did.