That sounds like a lot of fun! I can check into doing it in either Godot, or I think there is a specific application for making visual novels. It shouldn't be too much harder to make it for both computer and mobile if I use Godot, unless there are certaint design directions that won't fit with computer.
Viewing post in Programmer looking to work with an artist
Okay, I've been playing around with Ren'py, and I gotta say, its a TON of fun! Its not that complex of a coding language, while still letting you do everything you could ever want to inside of it! (for a visual novel at least) I mean, the fact Doki Doki was made in it speaks to the endless posibilities of the program. The program also has an extract for Andriod and IOS, Idk if they work or not, will have to play around with it. This will make it increadibly easy to put it on mobile, and on pc, expanding the posible audience! I'm super pumped to continue to play around with the engine, as it is a lot of fun to futz with!