Thanks for all of the feedback everyone! It was a really successful pyweek and everyone made cool games. Your responses will help as I continue to work on the game (and engine). 66% reported not working shows that I was too ambitious, which I pretty much knew by thursday when I had yet to have a functioning game of any kind. I was actually shocked that the final version, at least from what I could tell, "worked". I finally solved the main remaining issues Saturday morning and implemented the rest of the game logic in the next few hours.

Making a mulitplayer game for a contest like this is not recommended. The biggest issue is with the judging process - the game requires 2 players to play, and none of the judges are going to sit around and wait for an opponent. (I didn't really implement any real matchmaking either). I certainly wouldn't! I also made a poor decision of randomly choosing which player is "first" - since you are restricted from making moves during your opponents turn, the effect this had was that new players are randomly going to have a "frozen" screen with no way to interact, and aren't going to sit around and wait for the opponent to join to take the first turn.

Beyond the multiplayer "mistakes", I also was using a new framework, kivy. Some of the "not working" were probably due to issues getting that framework installed. I didn't really provide guidance on this requirement or the version the game was meant for, so not doing myself any favors there! I actually had a difficult time getting this framework to lay out the widgets the way I wanted them to. That was actually a bigger technical challenge for me than building the netcode. I don't know if it's a case of my brain not working the way the kivy creatores set it up, if I made too many assumptions and didn't read the documentation clearly, or if the documentation is lacking. There are some patterns it uses that I haven't had a lot of experience with, so I'm happy to blame myself.

I think the main features that fell on the floor due to my slow start with the framework, are player feedback. There is no description in the game of how the game works or what you are supposed to be doing. There's very little clear feedback showing why you couldn't do a thing, or what change your doing a thing actually did, making everything very confusing. I probably could have polished these elements if I had gotten the game part done a day earlier. Although I don't know - each new widget or animation was going to be hours of tweaking values to make kivy display it where and how big I wanted it to.

But...

My main goal was to get a jump start building a multiplayer card game engine. I knew going in it was very ambitious, and wasn't sure I'd be able to pull it off. I'm pretty happy with the results, and now have something to build on for this and future card game experiments I'd like to do. The next step is to clean up the code a bit, and then work on those feedback pieces to make it easier to keep things clear. I'm interested in the possibilities, and because I used kivy, I can actually make apps - which is the real goal here!

Congrats all!