This is such a super fun idea and very impressive.
Since you mentioned you updated, I figured I'd play through the browser version once more and now the MP does carry over, making everything pretty easy from level 3 onwards. I didn't even need Phoenix to defeat the Demon boss this time. It's a minor thing, but since 9999 was the max for MP, it was weird to have skills go over that at a certain point.
All in all very creative and cool entry :D