The game has the fundamentals, the art is good, the sounds are put well together. The game mechanics work fine.
There are some things that i personally think can be improved. I find picking up the coins quite hard, they disappear within 3-4 secs, and most of the time you have to get into the enemies to pick them up which is instant death. The visual for the picked card is barely visible, maybe a different/darker color, or solid boarder would make a big difference! But overall, the game is great, given the timespan for the game jam, you did a great job!