- video References
16키의 극단적 한계, 쿼모도 크라운챌린지 세계최초 클리어 | QuomodocunquizE 『 CROWN CHALLENGE 』World First Clear!!!!: https://www.youtube.com/watch?v=vq6QxGGrzKU&t=105s

First Ever REBIRTH in NES Tetris: https://www.youtube.com/watch?v=fXhbti5SneE&t=2878s

The Difficulty of Geometry Dash, Visualized: https://www.youtube.com/watch?v=4ktwuBGLCbM