Unfortunately, I've had some issue generating a Linux build of the game. However, if you're a Linux user and would like to try the game, I can confirm that the game runs great under Proton compatibility!

If you'd like to try and play through proton, please follow these steps.

Add Uwaiteru as a non-steam game:

1. Launch Steam.
2. Click the Games menu, choose Add a Non-Steam Game to My Library.
3. Browse for games on your computer (GGJ2025.exe) or put a check next to the game(s) you wish to add to the Library.
4. Click on Add Selected Programs.

Set the game to use the Proton compatibility software:

1. Select the game in Steam, then right click and select Properties.
2. In the Properties window select the Compatibility tab.
3. Then enable "Force use of a specific Steam Play Compatibility tool"
4. Finally from the dropdown menu below, select "Proton Experimental"

Now when you attempt to launch the game through steam, the game will begin installing the per-requite C++ libraries, then launch once the installation has completed! 

The game seems to run great using Proton and on the Steamdeck I'm consistently getting 90 to 100 fps on EPIC (max) setting, and significantly faster for all other settings.

(Thanks ricjones for the suggestion to post this tip!)