Just a short demonstration, showing off Minecraft Beta 1.7.3 running on the steam deck! It runs great, and the setup was pretty easy, if a bit lengthy.
To set this up:
1. Go into desktop mode and install Prism launcher via the store
2. Add the game to Steam as a non-steam game
3. Get the controller set up with key binds that make sense for you (I use A for space to jump, the left stick to WASD, etc)
4. There you go, easy as that