Fun game, very challenging. Got Liv, Pearl, and Basil in my final snapshot, as well as one trophy (the last one). Unfortunately I wasn't able to get the first trophy because I had dropped it much earlier in the timeline, and I couldn't figure out how to get the second one. I also wasn't able to satisfy Pluto since I would have had to undo a big chunk of my progress. Maybe if I had a second album that tracked changes to the first...
I'm glad you found it fun, and good job getting so many of the bonuses!
You can still reclaim the first trophy if you create a branch starting at a different snapshot. There's also a way to get it using a Revert.
I like that idea of putting the album in a bigger album. It's always amusing when a puzzle game becomes recursive :D