You'll have to try it out for yourself. Go to where the end is and.. do something!
Viewing post in Just Punch (Hololive Fangame) comments
to also be fair, if you play the game it's very hard to miss where the intended end point of the game is as it's the only major structure as well as one of the first things you're facing when you open the game. i felt like it should have been obvious, but i understand what you might be saying. maybe that's just me. as for the secret itself, i don't like spoiling secrets so instead of outright saying what to do or where it is i just give vague hints instead so players can try find it for themselves.