This was cool little experience, i really like that the central game mechanic with the coin flips are physics simulations and not based on RNG, so that you actually have a lot of control while still being random enough with the cards to keep things interesting.
Really the only feedback i have is the audio and the text on the cards, maybe it was just me but there wasn't any sound or music in the game, but since its a game jam submission it makes sense though. With the text on the cards, since some cards use drop and some use earn, that was a bit confusing. I think it would've been better if you just used earn. Overall pretty good game.