Haaaa, got a pritty high score in my first attempt! I ended up putting almost all my upgrades in the first deck and mostly draw from it.
I like the music and art style of this game. I also really like the gameplay (can't help myself - I enjoy these simple gambling games), reminded me a bit of the voltorb flip minigame in pokemon hgss.
Some suggestion: I think the game would look better if you could use the same font for the UI buttons as you used for the panels and instructions. I am not sure if I am correct, but maybe the bombs are too punishing as the same amount of bombs is kept in the deck - as once recieving a bomb in one deck, the deck looses a lot of value. Not sure how to change it though.
Overall, I really like your game!