I am at the end and David is not here and I can't open the door because theres no key. I guess I am stuck here forever... plez help.

right now ,im in a moment where i turn on radio and anoy david,what next?

I played this game with my best friend and we found the true ending David's not there, it's a glitch?

I freed Karis from the TV, she had this long conversation with David (who was not in the room at all), then said we were leaving. She walked up to the door. So I walk up, try to open the door, but I of course don't have the key. I walk over to the drawer and there's no key there. I tried the chest out of desperation but there's no key in there either. I then went to the radio (which says (E) Examine) but pressing E does nothing. Am I missing something or did I run into some kind of bug?...

If someone, anyone really, wants some guides for how to get every ending, I'll gladly write some up.