One problem: I did the exact thing you said, yet I'm still not able to restart the game...
I really apologize if that's the case. The thing is the game was intentionally designed to only be playable once, I've heard some players say that it's possible to restart by doing that but that's a workaround to an intentional restriction.
I have updated the game! you can restart the game by pressing any of the keyboard keys in the end 8 times.
