You can use this tool https://lospec.com/pixel-art-scaler/ to upscale the assets 3x to match MV's 48x48 tile size.
Once you've done that you'll need to change the dimensions and move things around to match the dimensions of MV's tile sheets.
None of the walls or floors are set up for autotiling, so you'd need to hand place wall and floor tiles.
RPG Maker compatibility is something I might add in future.