Hello, and thank you for your appreciation, friend.
I do want to publish Theanthria on Steam, but I've been hesitant because I wanted to wait until the game was in a better condition to present it to the Steam audience. As you have mentioned, the game still has a lot of optimization issues (and other countless bugs) that I'm struggling with at the moment.
So, yes, I hope to upload it to Steam eventually. And yes, I'm working on optimizing performance, don't worry :3
Again, thanks for your comment.