Hmm, don't know why it's showing that. I haven't seen that before and haven't worked on this for years. It was a test game so may well have a glitch but this issue is likely in one of the support files rather than in the main program.
Try clearing the contents of the 'endings_data' file in the games data directory. Don't delete the file though.
I'll have to look. Thanks for letting me know. I assume you haven't seen all the endings based on the video.
