Good job on everything, it’s looking great.
I’ve got some bugs for you
Zoom by dragging: please constrain it to avoid interpreting a click as a tiny drag that translates to a 23804234% zoom. It happens all the time to me.
Create shape > convert to clip > enter the clip timeline > create a second frame > delete second frame and stay on it with the playhead > exit the clip timeline > the clip disappears
I don’t know what I did and I cannot reproduce it, but at some point the onion skin stopped working properly inside all clips, it’s offset and off-scale. I’m attaching a corrupt project (double click on the clip to see the problem, it also applies to newly created clips)