If you see the empty blue screen for like forever, just refresh and try again. Click i & o at the same time to bring menu, like speedhack and noclip.
Thanks @DrizzlyRB, and @Captinflufball for the very streamlined and accurate editor. Play on turbowarp (less lag) https://turbowarp.org/1296493491/fullscreen geometry dash, gd, wave, wave challenge,
