While it was already playable with Proton, the developer of Please, Touch The Artwork 2 has added a Native Linux version. Announced in a Steam post on Friday, 26th June they mentioned:
I'm happy to announce that "Please, Touch The Artwork 2" is now also available on Linux with a native build.
It was already SteamDeck compatible but that via Proton (a tool that makes Windows games run on SteamOS/Linux)
It's also still a 1000% free!
Direct Link
More about it: "Touch the artwork and help a lost skeleton artist find its way home in a surreal, hand-painted universe. Collect hidden objects for its quirky inhabitants, solve casual puzzles, and restore cracks in the fabric of the paintings. This slow paced relaxing adventure was carefully crafted from works by James Ensor, a Belgian pioneer in the world of Modern Art."
Check it out free on Steam.
https://store.steampowered.com/search/?developer=Joe%20Richardson
... for obvious reasons, I guess
Something about that combination of point & click and classic paintings just tickles my brain.
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