Hey man, just bought some assets and threw a few extras in the tin. Love your work on this and the little general character.
Only one fault so far on this pack: The stone-to-grass transition tiles are 1px south / -1px on the y axis.
I'm working on using it as the basis for a tilemap in godot 4.1. So far, so good. If I get a working scene, and the .tscn works the way I hope, I'll try and make it with some instructions on how to use and then you could bundle that in. Godot scene files (.tscn) should make this very very easy to import and use. (You can even set custom data layers, so I'm trying to make it so the surfaces (up, down, right, left) have values stored per cell, so easier to then have your character tell what surface it is on and so things like sliding distances, footstep sounds and so on are stored per cell.
Hope I can make it all work well. But your work is really useful.