The intro really sounds like an old dark movie! I love the dissonances in it and the ambiance that emanates from this very cinematic track. Very good opening for a story with a mysterious scene! The second track evoke something more dreamy and charming but still has this intriguing feeling. The last one feels etheral and reflect the sky in a dark way.
The whole OST is consistent in terms of identity and that's a great thing as I could imagine a world with a lot of landscapes and stuff :)