I am proud that I found 2/5 of the thingys, this is a fair effort for me lol. I enjoyed running around trying to find secrets to progress.
Obviously the game is highly polished, and plays well. I like the starting area, and I love the way this game effectively makes you rethink how you might traverse through an area that would be totally normal or straightforward looking in any other platformer.
I do sometimes dislike when I make a rookie mistake that makes me move a long way across the level, with nothing to be able to undo that (even though it might be able to be abused, a button to undo the current "Flying" movement? or at least one to speed it up).