I don't think I ever played a game like this before! It definitely has a lot of space which really shifts the gameplay feeling in an interesting way. I like the mysterious atmosphere a lot, and I think that the writing is one of games biggest strengths, because it really sucked me in and caught my attention!
I got to two endings in total (one was the standard ending of fixing the pipe normally, another one was where I offered the shadow as a tribute to the statue) - and it feels like there is still much more that I could do, but the fact that I would have to redo everything is kind of disheartening. I could imagine that at each point where you make a decision or get/trade an item, you could make a checkpoint, and once you die, you can scroll back to your checkpoints and continue on from one of them. Just an idea though, to encourage players to get all endings / see all lore!
One incredibly tiny nitpick, and something that bothered me more than it should have - the fact that the diagonal walking does not exactly diagonally walk through a tile square on the ground really drove me crazy at some points! xD