Thank you for your very kind feedback!
You are totally correct about, well pretty much all you said lol. A level select (In that exact spot) and a highscore system has already been implemented. I'll update as soon as the jam is finished, but thought i'd keep the jam version up for the duration of the jam.
I didn't even think about how they were placed in the menu, but i will definitely be switching their spots. The Challenge mode is where the game is.
I'm glad you enjoyed, thanks for taking your time to write such a thoughtful review.