Hey, thank you for your detailed feedback!
I recently watched some videos on level/puzzle design (e.g. GDC talks), and I think I have a better understanding on that now. We didn't have any experience on that when we made the game, so we basically just started building some levels right away without much planning. 😅
We will update the game some time after the jam is over, and rework the current levels to incorporate all of the feedback we got as much as possible, and likely even add new mechanics and levels after that.
I will definitely work on the UI as well, since it appears that many people didn't really understand what exactly it shows and how important it is (that's why we also added that to our itch-page's description for now).
Thanks again, the amount of high-quality feedback we already got is amazing, and I'm glad you liked some parts of our game! 😀