I don't think I've seen this sort of idea before, what a fun concept! I like all of the art and the great variety of clothes that can be discovered. The 3D effect is cool and makes the scenes feel a lot more dynamic! Sounds and music all felt right for what you're doing.
Some sort of a time system that moved the characters can be a way to keep players going from place to place in search of new clothes, and give more of a reason to revisit the areas to see what's changed.
I like that it can be both a fun little adventure or a grand quest to collect all of the outfits. References to other jam characters are a really neat bonus!