I forgot their Nationality :/
Stereo Madness: Netherland
Back on track: Findland- I mean Finland
Polargeist: Malta
Dry Out-Base After Base-Cant Let Go: Finland (bro hell this is triple (spike))
Jumper-Time Machine: Norway (No wayy😨😨😱😱😱😱)
Cycles-Xstep: Same as Back on Track
Clutterfunk: Norway
Theory of everything: The USA
Electroman Advertisement: Norway
Clubstep-Electrodynamix: The USA
Hexagon Force-Blast Processing: Norway
Theory of everything 2: USA
Geometrical Dumbinator: NO(r)WAYY
Deadlocked: CANADA
Fingerdash-Dash: (in my opinion) The USA, Same as them too
The Tower: (in my opinion too) Phillipines
All of the GD World's levels: Mexico
Press Start: The USA
Nock Em Out🔥: Sweden (bro aren't RobTop)
Power dream- Trip: The USA
Gd Meltdowns: Canada
The Challenge: Sweden (RobTop's daughter)

Note: Alot of them i take from newground, so hope this help