I really liked the alternate take on the theme (an ancient tradition) and also liked the implementation of a card drafting game (which I tend to be a bit of a sucker for)
It would have been great to have an in-game tutorial (perhaps that guides you through a basic fight) I can appreciate that it's quite a stretch for a week long jam though, so perhaps a text reminder somewhere of what the different icons on the cards mean? I would have found that really helpful.
I like the art style and drawings on the cards, giving a sense of individuality to the different clowns. When picking my clowns initially, it would have been great to know how many choices I have left or maybe be able to pick multiple cards from a single set of four presented.
I liked the random events and that fighting wasn't your only option - that's a feature I really appreciated in the things like "Slay the Spire", adding a lot of variety to encounters so it was great to see it here to!