The game defaults to "Keyboard (WASD) and Mouse" controller template, but supports gamepads and it's the preferred scheme. If you switch to a "Gamepad" template in-game, the game detects the gamepad well and works fine from that point. If you however save the "Gamepad" configuration, the next time the game is started it does not detect any input from the gamepad. If you then switch back to "Keyboard (WASD) and Mouse" and then back to "Gamepad" while in-game, everything works fine again. So the issue is possibly in some initial gamepad detection.
edit: The issue is the same on Steam Deck and desktop Linux (Fedora Silverblue in my case).
Reproduction
Start the game and switch from "Keyboard (WASD) and Mouse" controller template to "Gamepad" - the game will detect the gamepad and everything works fine.
Start the game with "Gamepad" template saved and the game won't receive any input. If you then toggle between those configurations in-game, gamepad will work fine.
The game should work with "Gamepad" template being initially selected.
Compatibility Report
System Information
I confirm:
steam-3373660.log
Symptoms
The game defaults to "Keyboard (WASD) and Mouse" controller template, but supports gamepads and it's the preferred scheme. If you switch to a "Gamepad" template in-game, the game detects the gamepad well and works fine from that point. If you however save the "Gamepad" configuration, the next time the game is started it does not detect any input from the gamepad. If you then switch back to "Keyboard (WASD) and Mouse" and then back to "Gamepad" while in-game, everything works fine again. So the issue is possibly in some initial gamepad detection.
edit: The issue is the same on Steam Deck and desktop Linux (Fedora Silverblue in my case).
Reproduction
Start the game and switch from "Keyboard (WASD) and Mouse" controller template to "Gamepad" - the game will detect the gamepad and everything works fine.
Start the game with "Gamepad" template saved and the game won't receive any input. If you then toggle between those configurations in-game, gamepad will work fine.
The game should work with "Gamepad" template being initially selected.