First of all , thank you so much for taking the time to check it out! It really means a lot!
After you found Ending 5 I think you pressed 9 for the other room ... Which actually is not ending 9 it's a tip to find Ending 9. You have to use the same trick that you used in Ending 5 to find 9 but in a different room. Also if you wait 10 seconds the game sends you back to the original room.
I want to ask ... Did you find ending 4 (custom skin) and 8 ?
They show you a kind of a map which allows you to understand where each of the ending leads and how to find ending 9 (which is the hardest one to find) Ultimately all endings give you tips to find some other one!
I think the narrator idea is amazing ! But I would have to record way to many Dialogues by myself ... I might give it a spin in a future game.
With how and where to find the other endings that is part of the puzzle of the game Endings 1-4 are straightforward you just have to make different choices in the Sunflower route and they give you tips about other endings!