Ensure your system firmware is up to date to support the latest update (v131072).
Always support indie developers! If you enjoy the game, consider purchasing it on the Nintendo eShop or other official platforms to help the creators make more amazing titles. Download Death's Door [0100B31015AF8800][v131072] nsp rar
Since the file is in .rar format, use WinRAR or 7-Zip to extract the .nsp . Ensure your system firmware is up to date