Tellus Games have released Oblin Party, a physics-based 2D party party brawler where you have direct control over your two hands made with Godot. It has Native Linux support and should work great on Steam Deck too.
A highly dynamic funny brawler where you use your wiggly arms to throw yourself around the various chaotic maps. You can play it via local multiplayer or online too for 2-4 players. The main idea is to force your friends off the map to win, by whatever means necessary. Outwit them using physics fun with your arms or pick up a weapon.
It's not just you with the physics though. The maps are wobbly as well and react to both of you, so things do get pretty funny in it. There's even a single-player time-trial mode so you can get better at the physics system.

Direct Link
Well worth a look if you have people to play with.
See more from me