List of sound playables on this page (4 files):

zoom 909 (sg-1000) - 01 - title screen.vgm
zoom 909 (sg-1000) - 02 - main theme.vgm
zoom 909 (sg-1000) - 03 - boss.vgm
zoom 909 (sg-1000) - 04 - game over.vgm