The game does not start out-of-the-box for me (not even with Proton 4.11-13). The game starts after selecting "Steam Linux Runtime" as compatibility tool (it starts the Linux native version). The Steamdeck gamepad controls (sticks, buttons, trackpads) are not supported by the default "11bit studios" gamepad layout. Only screen touch control works. By changing to one of the community layouts, the game becomes playable.

Game did not start out-of-the-box for me (with any Proton version). The game starts after changing to "Steam Linux Runtime" as compatibility tool (selecting the Linux native version). The default "11bit Studios" gamepad layout does not work (only screen touch controls work). After changing to a community layout the game becomes playable with the Steamdeck controls. I would not consider this game as a "Playable" title for the Steamdeck.