I played this for a really, really long time! The loop is addictive to say the least haha.
The flying part of the game is very well thought out, making use of quick decision making and reflex skills; I really enjoyed the risk-reward gameplay, and the mystery of the tower became very, very strong after I got to the clouds and saw the cogs for the first time; realising there was more than I had thought.
The crafting side of things is way, way too easy, but it doesn't really matter to be honest, as it mainly serves to add continuity and progression to the main part of the game. I actually think I would've found it tedious if it was harder.
The art is absolutely gorgeous, that needn't be said, and the audio excellent.
Absolutely stunning job here man! Rated 5/5 for almost all categories!