Extremely nicely done, great interpretation of the theme.
The difficulty curve may be a bit twisted but that's expected in a jam. I ended up with 7/10 secrets and I feel like collecting them may be one of the more attractive part of the game.
You puzzle design is on point, every solutions felt neat and deliberate, that's impressive work (especially with such a simplistic starting point). It really deserve to be at the very top from what I've seen so far in the jam.
If I had to nitpick, I think the resolution and overall sprites integration may need some work. The main character look like she's not made to be displayed at this size which can cause her outline to disappear sometimes. 1 ticker outline or a neater resolution may fix that. One of the most endearing MC out there by the way, excellent spritework.
Amazing entry overall, nice job.