Glad you enjoyed!
It'd be possible for sure but I reckon you'd maybe only fit 1 maybe 2 cases on a rom before you ran out of space.
I chose Case 1 since it's a very compact/introduction to the games, it's very short and doesn't have a lot of characters/scenes, like it not having any of the investigation scenes makes it a lot smaller.
80% of the GB Studio project file is included in the Roms+Bonuses.zip, (I removed cross examination 2 but the fundamentals are all there) so if someone wanted to take what I've done and make Case 2 they have the resources.
But for me I'm happy with just this, Capcom is pretty chill with fanworks but I don't want to push my luck, and of course there's a million others games I have to demake/make mockups of :D.