THE DEMO IS OUT NOW!
Finally, I have something fully playable, even if it has only a part of the content I want to eventually include.
Try it out on Itch: https://ultra-shenanigans.itch.io/abandoned-monsters-demo
I would appreciate hearing some feedback if you do. Either here or as comments on itch page. I've been aggressively hunting for bugs for a couple weeks now, so hopefully I didn't leave in anything major, but let me know about that too, if you notice something.