Hi there!! I'm honored to hear that you played through the game, thank you for checking it out!! The secret ending should automatically play itself once you restart the game after getting all the endings/posters- but I've been hearing that few others are having the same problem of not getting it. Thank you for letting me know, I'll try to look more into it and fix it for the next build! It's nothing that important so you're not missing out too much!! Thank you once again for playing!