Thank you for playing!
And thank you for your thoughts on blackjack, that's true that not everyone is familiar with the game. If I was to continue developing this game, I had imagined having a section that briefly explained how to play each game, or having a campaign mode that slowly introduced each game type to the player, so hopefully that would solve the issue.
For my music, I got my songs from https://incompetech.filmmusic.io, the exact links to each song are on the game page!
Thanks again!