The game itself works very well, however, you will need to modify your Proton setup to get the in-game browser to work properly. (Mainly because a lot of spaces use them for YouTube video players, etc.)

1. Locate the folder where your Proton version is installed. By default, this is usually under:
   /home/yourusername/.local/share/Steam/compatibilitytools.d
2. Open the Proton folder you're using and find a file named proton.
3. Open the proton file in a text editor.
4. Search for the string 6030. You’ll find an if statement with a list of game Steam IDs.
5. Add the following entry below the existing ones:
   "2564460", #Banter
6. Save the file.

Now launch Banter with the updated Proton version, and the browser should work as expected.