It's an art game that seems to exist in a game format mainly to serve as a way of making the story more immersive, rather than being what I would really consider a game. The puzzles are trivial to solve; the only challenge was finding them and figuring out the order they're supposed to be done. Caio95 alluded to the other thing that bugged me: exploration in a mostly desolate world with a slow-moving character in a round window became more of a chore than an enjoyment.
This might be nice as a pure art game if you're into that sort of thing, and I'll give you credit for achieving the tone that I think you were trying to set, but it's not my cup of tea unless it's also fun as a game. (The game Perdition is the best example that I can think of at the moment.)