gg took an hour, you will eventually get there dont give up itll make sense over time
I'll give a hint: go into the code and there is a marked area. If you go on badgamedev's channel and check his playlists, there will be a rick roll. at the end of the rick roll there will be another link. go to it and paste the code into the marked area. the red key will then spawn in front of the red door.