A lot of ports, especially from Japan, only do menus and graphics in new/general-purpose engines and use a native library with their old codebases for logic. I

A lot of ports, especially from Japan, only do menus and graphics in new/general-purpose engines and use a native library with their old codebases for logic. I can imagine that this was done here, Godot isn't really ready for a game like this IMO - it would have taken a huge amount of work.