itch.io

Hi I'm new to the game but probably if you support the developer on Patreon or you'll find them in the game at some point but as I said I've only just started

Go to the game's discord server, there is a post by the author with all the codes

In the discord server, there is a channel called: #zero-codes
Check it, there is a list with all codes there

They show you special pics or even hints of the game!