Snaps are a relatively recent way of packaging application installations in certain flavors of Linux. Steam is Valve’s game distribution platform (amongst other things).
There’s an unofficial Snap package to install Steam and it apparently doesn’t work so good
If you’re a little clever with interpolation, you don’t need to run at 1000s of frames per second! You’d just calculate how much time after the last frame it would take to cross the line at the last known speed and position.