Hi Peter, great project -- I happened to stumble across this on YouTube and it's exactly the kind of lightweight solution I'm looking for.
I'm curious if you have considered support for adding layers of images? My use case would be to gradually add and remove certain components from the Excalidraw diagram over the course of a presentation. My opinion is that the easiest way to do this as a user would be to:
transition between different images (the Excalidraw drawing) of the same size, in the background, with everything else being the same.
keyframe between the layers (either completely, or with transparent backgrounds so both can be seen)
Let me know if that brief description makes sense; happy to elaborate or perhaps contribute on any fronts that make sense for you.