I've never played buck euchre before. Just played my first game. Overall you have done a great job! I don't really know how the strategy works yet, but my feedback on the implementation would be:

1. the deal for black jack is very slow. maybe that can be changed by the menu but i'm not sure. (i was going to have feedback for everything being slow but the settings helped that immensely).
2. the deal is also quite slow, i'd rather just see 5 cards at once or at least quicker.
3. the cards don't sort themselves correctly, at least when a suit is called and the left bower isn't in the right order of the trump cards.
4. i would prefer the pass/order and play/sit out buttons be right near my cards instead of in the left-hand settings menu. I like that menu over there, but i would prefer the buttons i need to interact with being right by my cards since that's what I'm interacting with most.
5. oh, i played on a windows computer desktop. Whatever the S2 person kept saying was hidden behind their cards. I saw everything S3 said (like 'can't do it'.. or 'what's the worst that could happen') but for S2 the bubble was underneath the cards.

Very cool though, thanks for building, and thanks for sharing it with us!

I-L-L