Do you plan on adopting this for rpg make mv
Everything was drawn at the current size, so there's nothing to be done to make it compatible except an upscale. Because the computer has to guess at filling in the new pixels, the results are going to be lower quality, there's no way around this. I could redraw everything at a larger size, but I don't have any desire to do so, it was tricky work getting all those edges to match in the first place, and it would only be more difficult at a larger size. Plus, it's not very interesting to redo work you've already done, it's the same amount of effort for a much lower result.
In other words, no, I don't have any plans, but it's a simple thing to adapt it to work in MV yourself if you don't mind the quality drop. Just increase the size of everything by setting the options to 150% in almost any art program (don't use MS Paint) and it will be the right size and format.
If you're in a situation where you can't do the resize yourself, I don't mind doing it, just let me know. I want you to be happy with my work, and it's very simple to do. I'd just rather not offer something inferior in quality if it's not necessary, because there's too many people who won't look at the explanation and think less of me for it.
Sorry if my explanation was too rambling, I'm in my manic phase and it's extremely difficult to be succinct right now.