Can you make a M.U.G.E.N. version of this perchance?
specifically the stage files
Well, MUGEN originally isn't designed for beat 'em up games. It's possible, but it requires a lot of workarounds. For example, MUGEN doesn't support interaction with stage elements, so I’d lose features like enterable stores, arrows that teleport the player when touched, etc.
About the stages, they're usually quite wide, and based on my experience in MUGEN, If a stage goes beyond 4000px in width, some glitches start to appear, like performance drops, desync between the character and the camera, etc. So yeah, it would be a tough conversion. I would basically have to make a very tiny stage with limitations.
Plus, my Android supporters would have to wait until I can find a way to properly port a MUGEN game to Android. But who knows... maybe I’ll try something in the future.