Most gamers nowadays walk forward watching at the game's content, they kill enemies, they finish the "boss" and watch the ending. After that they play another game, and there's other games after that and there's so little time for all of them. Finishing one game they know that there's nothing except this way forward, this one storyline, this one dimension. Achievements will increase replayability, of course. Grind to a 6969 level in some RPG and you can feel yourself a hero.
Big companies know that there's no point to hide secrets in the games, it's a waste of money and time. Secrets have died with the old games of 80s/90s/early 2000s.
Still, it's not the case here, with The Last Disbeliever.
If you will try to break the game, finding the bugs in the game levels (bad colliders, transparent walls and floor), you will find another world in the game, another look at the game's story and absolutely different experience. It will even lead you to the different levels and another ending. In this second world a developer himself will test your skills (and patience, of course).
It's a very abstract world filled with a glitchy environment, deadly platforms, beyond-craziness racing level and messages from developer. You're not supposed to be here, but you can.
There's also a third world, a secret slender-parody game, which is almost impossible to finish. But I already said enough, so there's no info about this one.
p.s. there's a typo on the wall. Not "brake", it's "break". My apologies.
The game itself will be proofread by native English speaker only before release.