Vapor Run works great on the Steam Deck, but you will need to use the touchscreen to create multiplayer rooms and to input your callsign. You will need to use the keyboard for this and can call it up by hitting the Steam button +X on the gamepad.

The “Menu” key will allow you to pull up the game options page. Here you can choose to quit the game, start and stop music, and select the controller type (Choose X-Box for the Steam Deck)