It would end after beating every main week and extra songs you would be brought to the finale which would feature Endgel fighting Oliver for one last time as they began to fight the world is slowy dying since Endgel's calamity got to the core causing the world to began to crack and get even worse as the world slowly I guess you could say it caves in.

But Oliver realizes this and get distracted and takes a critical blow leaving him more weak than before but using the Last bit of Alice's repaired necklace throws it into one of the cracks and it heads to the earths core causing it to explode and Oliver looks at Endgel and Endgel looks back and they both realize that they are gonna die and Oliver Accepts it walking off to spend his last moments with anyone else who survived which is only two people.

Endgel left by himself sits waiting for the release but then Claire appears as a kind of Angel and offers him a last dance together (Note since in this lore Claire and Engel met at a 6th grade dance) and they dance as the earth crumbles and shatters and by the end Endgel's aethos burn is gone and he is just Engel again and the entity that caused all of this is erased from every timeline and universe

With this true finale being a last tribute to FPE as a whole with millions of Universes appearing in Engel's and Claire's dance with it ending with Engel and Claire hugging and kissing as the last crack hits the world makes one last noise as it then explodes but a beautiful one

We then pan out to reveal that this was in Kattie's art room and she is packing most of the stuff up except for the FPE stuff and she looks back at it sighs and smiles shuts the door and we get a close up of a drawing of Claire and Engel holding hands along with happy drawings of the rest of the cast

And text fades in that says

END

thank you Kattie for everything without you I would have never started art hope you are doing well good luck on future endeavors

(Also Chip would survive because he lowkey goated)