Thanks for the feedback! I originally wanted to make a metroidvania, but quickly realized I didn't have time. I've always thought it would be funny to start a metroidvania without a jump
I think it's actually an awesome idea to make the player earn that jump, but I do think some kind of hint or feedback to the player that their jumping ability is yet to be found could be helpful—especially given that jumping is so ubiquitous in the genre. It would have saved me some grief for sure!