Never Give Up 「Permadeath Clear」
Incredibly dreadful experience. While I had fun getting 100% in-game casually, getting the last achievement is the worst thing I've experienced thus far. Never again.
No quit to menu was used as that is making the game trivial to even attempt permadeath. You can die, hit Esc and reset the whole stage with no penalty.
As of now, this will be my hardest platforming challenge I've done.
Time spent: 92.4h