Sources :
https://www.youtube.com/watch?v=Qvlb-Yo6Rqo&t=828s
https://geometry-dash.fandom.com/
https://www.youtube.com/watch?v=3ofZI82lKQ8&t=130s

niveaux :
https://www.youtube.com/watch?v=1O0d1A6GuSA
https://www.youtube.com/watch?v=6EOpGwAVglo
https://www.youtube.com/watch?v=-Jg-gDGK5Jg&pp=ygULeGVuZGVyIGdhbWU%3D
https://www.youtube.com/watch?v=XAqlh3LkRis&t=85s

Et des superbes vidéos pour comprendre un peu la communauté :
https://www.youtube.com/watch?v=xvy-_N4Rea0
https://www.youtube.com/watch?v=S-GpPEH2ojo