It’s not really a bug, but what was really annoying to me playing the game was that I accidentally started a small game project instead of a large one. It was quite frustrating, since you cannot cancel a project util it has finished.
What I would suggest is to remember the last project size when creating a new one. Maybe you could also introduce a way to cancel a running project.
Your suggestion for your previously selected size to be remembered is a good one. That way, if you start a game project prematurely, it will usually only be a little wrong rather than disastrously wrong.
I’ve never made this error. What I have done is produced a game for the wrong audience. I… I didn’t really want to make that Mature Virtual Pet game for the Gameling. I didn’t even want to think about it. (I loaded my autosave rather than progress with that one.)