Wow! That was really fun! The jazzy tune fits the mood quite well, and the cards are smooth and readable. A perfect mix of strategy and blind luck, especially with the more powerful abilities.
The swinging aces rule is really cool, and makes for some powerful plays! Unfortunately, after I had removed the face cards and halved all values, I started getting hands with so many aces in them that I could not tell what my "play score" was in relation to my "true minimum and maximum." I was essentially playing blind. And then, while I was playing blind, I started to wonder if the combination of face removal and all-halving might be too powerful. And then I started playing full hands, over and over again.
I unfortunately didn't record my high score, because I absent-mindedly pressed out, but I had gotten somewhere in the 3000s and had only busted five times, mostly towards the end in a string of bad luck. I urge you to try it; it's a surreal experience
The sound that plays while tallying the score is quite loud; it regularly peaks the audio above -0 dB.
Exploits aside, this was fantastic! Great work!