As far as I know: there is no English demo... there is a German demo though...
Liquor is a spanish band... And from the booklet:
Original soundtrack & background music: David Gacía-Morales Inés
Titlesong "Runaway" by: Liquor
Extra guitars: Miguel Carrasco
Singing: Vera Domínguez
All songs recorded at: Divad Ideas, Producciones Sonoras