Overall a neat Icarus-inspired platformer idea. Mostly well documented but in places needed more information. From the document, it still isn't clear to me exactly how the player will fly -- are there any limits/cooldown for the flying?
Hopefully this game should be fairly straightforward to implement, although the idea to have a range of art/world styles is a little scary one as this can have a huge effect on the total set of downloads needed to get this to work
Another challenge during development is going to be making the enemies that can damage from a range.