Definitely was a fun, chaotic vibe - like others, I wasn't sure what to do at first, but when I read some comments and saw your explanation, things went a lot better. I'd consider updating your game page to have a small explainer about what you're trying to do right below the game window - I think a lot of people would enjoy this if they knew how to play! The Devil popping out to talk to you was a really nice touch, as was the shuffle animation. I'm not sure how much skill depth there is to getting 21s (it seems like it tends towards being luck based, though noticing if your score is a multiple of your card count above 21 is definitely a skill) so I'm not sure there's a ton of depth/replayability, but for a game jam game it was a fun time. Nice one!