Thank you very much for this great feedback! We agree that we need to explain the mechanics better, and it's on the top of the list in the post-jam update to implement this among some other things. It's not obvious how you return to the roof or how to activate the highlighting of valuables (it's a matter of flying at the correct height. Before you've bought Keen-Eyes upgrade you will need to soar around the top of the level to se the glint of the valuables - buying more levels will lower the threshold of how high you need to fly to see this).
Your last paragraph makes a lot of sense, and probably most of it is stuff we will implement post-jam. :)
Many thanks again! :D