They have a link in the gane description stating it was made with GB Studio :3 it looks similar to the rpg maker engine, but with more of a focus on Gameboy style graphics and gameplay 🤔 definitely looks worth checking out!
Must have missed it, thanks! No clue which one that is, so far I only know Renpy, Unity, UnrealRPG Maker and Godot (next one I'll study).
