Love how unique this game is! I really think you have a winning formula and would encourage you to keep working and refining thig game beyond the jam.
One change which i think will make a world of difference is to make the blackjack part way faster. Waiting for the button to appear and for dealer to make his move really felt like chore.
Aside from that i love the game and applaud you for what you managed to accomplish in such a short time frame.
Definitely one of my favorite of the jam! and the one with most potential in my opinion.