Hey! :) Glad you're enjoying it.
Re: your question: Probably not, I honestly don't know. But it's pretty hard to sell something that I'm offering for free (albeit as an older version). Ideally I'd like to keep this up and not pull the plug on the free updates, unless I really need to due to financial constraints. That way people who can't afford to pay for the game can also benefit, and I get a bit of exposure and good will too. Patreon is for getting the latest version* here and now, basically - while supporting the development (*well, you actually get four, since I release new versions on Patreon every week, and the subscription time is a month anyway).
I also don't know when the game will be 'done' - because I don't have an exact idea re: what 'done' means. I keep adding things. Content I can probably keep adding forever (i.e. animations, wearables, arenas and so on). It's a project I enjoy working on, ultimately.
More likely I might spin off some other games based on the same animation engine, and try to see if I can offer them on Steam. But I have no concrete plans at the moment.