Sonic.exe (PC) - Hill Act 1.gym

Lord X, The Sonic Exe Wiki

The Story of Sonic.Exe (feat. Tom) by GarfieldCat12345 on DeviantArt

Sonic.exe (Commentary)

Sonic Green Hill Zone Sheet music for Piano (Piano Duo)

Green Hill Zone - Sonic the Hedgehog (For your listening pleasure ONLY!) Sheet music for Piano, Flute, Guitar, Clarinet other & more instruments (Mixed Quintet)

Sonic EXE, Villain Song Wiki

Green Hill Zone Sheet Music Flute and Piano Duet by X Dragons Claw X-d5brlp8

I arranged Green Hill Zone's theme for piano! And here's the sheet music! : r/SonicTheHedgehog

Sonic.exe by mylittledashie3 on DeviantArt

Game Music Themes - Green Hill Zone from Sonic the Hedgehog by Deadally