Bluescreen x reader: Learning codes to understand you

You fell into a hole because of your curiosity and ended up entering a door in the middle of nowhere and not being able to leave, despite having few memories, you still remember your family and friends, and would like to return to them someday .
But it will be that a new shy friend who speaks in codes, could help him?

Remembering: Bluescreen was made by @7goodangel on Tumblr.