Amazing visual design! Loved how everything was super in-theme by being a pop-up book, flipping pages, the curtains and sketches!
Sharing and buying other people's outfits was also super inspired idea, impressive implementation for the short dev time. I liked that different stores had different prices for items, but I would have loved seeing a bit more "unique style" per store and more varied soundtrack. Super well utilized SFX as well. Challenges added a bit of extra gameplay loop which was very welcome, although a bit easier to bypass and just insta-submit. Sometimes what I bought wasn't exactly what I got as well.
Loved the UI as well! I think the "go back" from the store is a bit obscured in the bottom left corner though, and it doesn't appear in browser mode (does in fullscreen for me).
Great work overall!