Day something, unexpected challenges
There are all sorts of issues you should really resolve before a game jam. I was getting a poor wifi connection via the USB adapter on my Windows box. Today my new powerline adapters arrived. Some people dislike powerline as a prehistoric technology, but it just works and doesn't give me unfathomable error messages. It's all about removing distractions so you can concentrate on the code.
Another challenge is distributing test builds. Other game jammers are a savvy bunch, but our playtesters have had a few issues with extracting zipped files and maintaining the proper hierarchy so the executable can find the resource directory. If power users stumble, what can we expect of casual gamers? I wonder how we can signal requirements of this sort, especially when nobody reads READMEs. There are plenty of principles, but no standards I can think of short of app stores.