I loved it, but I also like roguelike deckbuilders. It has some innovative mechanics and it's nifty in the way it tells the story. The first part is the strongest, and that part is replayable with extra challenges once you beat the game. It's challenging at first and is designed to take repeated attempts but it gets easier once you unlock stuff and start learning mechanics and tricks.

I really like the emergent complexity that comes from having relatively straightforward card abilities but the ability to graft an ability from one card to another. It leaves a lot of room for discovery and creative thinking, and there's also a couple cards with hidden easter egg effects, and your choices building the deck feel meaningful. But if the genre doesn't appeal to you, you might consider Pony Island instead, by the same guy.

~~Dumb brag but I beat Kaycee's Mod with all challenges active it's really fun~~