First image: Ubuntus snap store: https://snapcraft.io/search?category=games
Second image: Linux Mint Software Repo
But from my personal experience, most people would just run Steam and install games over there. Thanks to Proton/Wine you can run many, many games, even those that weren't developed for Linux. (Wine, Lutrix etc. would do equally good, but I think Steam is meta)
Many people are amazed, how many games run on Linux just fine. Mostly AAA games won't run due to stupid DRM, custom launcher or crazy graphics code. It would be rather odd if Teeworlds wouldn't work.
True. Though mostly an issue when playing on potato-computer, or 144 hz, or 4k+. (Since modern AAA games won't run anyway, and older games or indie games usually have lower requirements.)
Most gaming pc are oversized, that doesn't really matter nowadays. Minecraft is one of the most popular games. You can play it on a Raspberry Pi, no need for 8 core/16 threads CPU and RTX gpu.
15:17
Still, many people own them. Just to play Among Us.
in fact, when you open the ubuntu store, teeworlds was on the front of it for a good while. there aren't so many games straight up developed with that platform in mind
Ubuntu Snap Store is bloat that slows down your system and applications running inside it's "jail" significantly. Consider completely disabling it using preferences.d and moving to APT
But yeah, the only good games I know developed for Linux in particular are Teeworlds and SuperTuxKart. But as the community is growing, there might be some other titles being developed. Who knows?