The music is giving me spooky berlin club vibes which oddly goes really well with the gambling aspect of it lol. The reaction style witch reminds a lot of the spooky casino in Ni No Kuni - it's a really fun way to convey what's going on in the game!
Not fully sure when the game is over though so maybe having multiple levels with different opponents or some other explicit type of progression would really hook the player seeing as the loop of playing already goes so quick and is inherently fun.
Well done!