Because I don't trust Adobe anymore regarding support for Flash/Animate, I have decided to switch to a different animation program.
As it turns out, it wasn't very hard to find a suitable replacement in OpenToonz. For those unaware, OpenToonz is a free and open source animation toolkit based on the software that Studio Ghibli has been using to make their productions in more recent years.
I've been toying around with it a bit, and I already like a lot of its drawing elements much more than I did with Flash. Seems to work better with my tablet as well, strangely enough. Still, I will need to get more acquainted with it before I attempt any large projects using the software.
Before I begin work on the movie proper, I will probably attempt to create at least one short animation using OpenToonz as a warm up. If I do that, and it's any good, I will post it here.