How do I make a tas?

I don't know, I play on mobile

There's (for now) no TAS possible on hello neighbor. I think recto was trying to make one so you should ask him.

You can use cheat engine to slow down the game. I guess that works but you would have to say its a tas run.

The best you can do is make a sob where you take clips from youtube and put them together.

sob's are fun