I am VERY pleased to report that nary a single bug raised its head during playtesting.
Games played included United Nevada, Bally Sea Island, Bally Bikini, and a few other Bally games.
My animations mostly held up very well - there's a timing-related thing during startup - it is near impossible to time correctly due to the not-quite-a-ms-when-you-ask-for-a-ms nature of the framework. That's ok. Causes a few little jitters sometimes, but I'm not really worried about it. I can make it so that it does not cause the jitters, but the animation would be able to pre-empt itself in that case, which seems like a silly thing to do. Decisions, decisions.
I also realized that I have one more animation to write (I forgot. ) Miami Beach, with its Magic Curtains, works in a similar fashion to one direction on the Magic Screen. Should be a short leap to getting that working.
Things are going extremely well, and I am very much looking forward to York. Who's ready to try it?