The animation on this Fun Spot scene seems to work as it is. When I uploaded a recent edit of the film onto Film Freeway, I discovered a slew of scenes that ended up cropping incorrectly. Black bars appear on the right side of the screen. I am going through the whole film to try and catch each and every one of these glitches.
I have been viewing the film mostly in the Premiere Pro program. In that program the film plays against a dark field. With that dark field I didn’t notice the dark glitches. It was only when watching the film on Film Freeway, that I noticed the glitches. Film Freeway plays the film against a light tan filed and the black bars suddenly became obvious. I have also been watching the film on a tiny laptop screen.
I didn’t notice the glitches when the film played on a large screen at the Chicago International Reel Shorts Film Festival. That is because the theater was dark and the glitches would have been less obvious. Anyway, now I am on the case.