Super Mario World
Nintendo: The whole game

The romhack
Vyxi: Creator of the romhack, made it entirely.

Music sources:
Title screen theme: Super Mario Bros 35 - Title (Ported by Goomba-24)
BGM 1: Super Mario Land - Birabuto Kingdom (Remixed and ported by KBY30)
Miss: Castle Of Illusion Starring Mick - Death (Ported byBrutapode69)
Star: Marble Madness - Practice (Ported by MercutyPenny)
Victory: Sonic 3 & Knuckles - Act clear (Ported by hazel)
BGM 2: Spider Man 2 - Pizza theme (Ported by Wakana)
Keyhole: Earthbound - Oncoming Boss (Ported by MercuryPenny)
Discombobulation: Sonic CD - Stardust Speedway Zone (Past) (Ported by bebn legg)
Cuspresso City entrance: Lagrange Point - Defeated (Ported by Milon Luxy)
Cuspresso City: Castlevania Dracula X - Bloodlines (Ported by Kevin)
Me Gongaga secret: Earthbound - Sea Of Eden (Ported by Kevin)
Redemption Castle: Super Mario Land 2 - Wario's Castle (Ported by Gamma V)

Graphics sources:
Cuspresso City background: Klonoa 2: Dream Champ Tournament - City (Ripped by Rykon-V73)
Cuspresso City tiles/foreground: City by PercentN (Original)
Pizza: Pizza by YoshiFanatic (Original)