Thanks to FireProof FAQ page We have this 5 x GamePause Trick. (or 5GP in short) [quote]In the meantime, there’s a hidden system in the game to take you back to a point in the game before the bug occurred. To do that, pause the game and tap the “Game Paused” text five times. That’ll bring up a menu listing some points you can revert to. Choose the Japanese Gallery (that should be the last room you opened). You’ll have to repeat a little of your progress, but hopefully, you won’t have the same problem again.[/quote] Meaning you can press game pause 5 times for chapter selection and skip forward towards the attic.

On additional, phone "back" button can open the pause menu even the cutscene started, but it will be invisible, so it requires you to remember the menu layout. The sound effect still works, and that's key for knowing are you in pause menu or not.

"We" extended category of Any% and Cheat%, Cheat% you CAN use 5 x Game Pause, Any% you CANT use 5 x Game Pause. Thanks and have fun speedrunning