The tilesets are beautiful, but they don't seem to be (as far as I can tell) formatted for RPGMaker.
Unless I am mistaken, as things stand now, this will require a lot of cropping and moving things around.
Viewing post in Adventure Begins - 16x16 Retro Tiles & Characters comments
Hey! Yes, at the present date these tilesets included are not rpgmaker-ready! I'm still working a bit on tilesets and autotiles, which are not available yet as an rpgmaker format (I would like to provide an actual rgss file with connections and interactions working, but I'm a bit unfamiliar with rmvx, vx ace and mz and it's taking a bit of time) Characters instead are already rpgmaker-ready!
I am planning a big release with godot and possibly gb studio formats all together!