the real end wich is lvl 9223372036854775807 (wich is a spiral stairs going upwards,theres a room and heres how to escape it,first you need to count the stairs to excactly 5000 stairs and jump down the railings)
And for lvl 5 add "the end" wich is a trap thinking its "the end" and how to escape "the end"?you need to go to the bookshelf on the left next to the computer excactly aligned with computer.