I'm a fan of card games like Slay the Spire, Dicey Dungeons, and Monster Train run on practically anything. There's hundreds of hours of fun in there if you're into these games.
Have you ever played Deep Sky Derelicts or One Step From Eden? I have those two games in my library from somewhere (I presume Humblebundle) so I'm wondering if those two are good?
I haven't played Deep Sky Derelicts but One Step From Eden is a good time. It's much more of an action game than a card game though, and very fast paced.