I absolutely LOVE the redesigns and concepts you've done! I haven't tried the 2020 build, but I certainly couldn't get used to the physics of the battle system, like why am I unable to jump high no matter how much I hit W? Aside from that, it's amazing, and I hope this evolves to be full-fledged! I really like the inclusion of Spinball noises too! Though, when you said there was gonna be from fangame to indie game, I would suggest still keeping the fuzziness that Sonic and Amy(?) have, but that's really just me being a dumb furry. Wonderful!