The mod enables proper ultrawide and superwide support in the game.

• Unpack the archive and put the "ultrawide" (for 21:9) or "superwide" (for 32:9) folder in "mods" within the main game folder.
  
• Launch the game and enable the mod by checking its box
  
• Quit the game
  
• Open %USERPROFILE%\AppData\LocalLow\Nolla_Games_Noita\save_shared\config.xml in a text editor and change internal_size_w="1280" to internal_size_w="1707" (for 21:9) or internal_size_w="2560" (for 32:9)
  
• Launch the game again - the mod should be working now!