I've been tinkering with my Steam Deck almost since I got it a month ago. I mostly use it hooked up to the TV with a PS5 controller. I have a problem with sticking to one game and tend to jump around a lot between them, but here are ones I can remember playing in the last week or so for a decent amount of time:
Fantasy Life i: Not usually a fan of cozy games - I like more direction - so this one looked right up my ally with an actual plot to follow along. I got about 10 hours in until the game started blocking my progress by requiring I find buddies to advance the story. I'm not interested in having to look up where they can be found, so I dropped it. It was a fun 10 hours, though!
Broforce: Bought it for the 3rd time on Steam so I could access player-made levels, something not available on other platforms. I love this game! Wish they'd make a sequel or even an official expansion.
Banjo-Kazooie and Tooie: I recently decided to test out 360 emulation on the Deck via Xenia and remembered these 2 were on it with better framerates and camera control than the originals. Pretty funny to use a 360 emulator to play N64 games, but until the fanmade PC ports are available it's the best way to play them.
My next tinker project is seeing if I can get the DS models and texture mod for Mario 64 EX working. I have a thing where I prefer to play official upgrades to graphics when possible, which is why I'm use the 3DS textures for Ocarina of Time on the PC port.
Yeah, a circle by itself isn't an object that actually exists in real space, but a geometric concept, so I don't imagine more than black lines if not given any other information. Same with a square, triangle, etc.
It's a world of gods that intervene with mortals, so a GM is perfectly justified in-universe in smiting any players who get out of hand.