Orbital

Orbital is a 1-player arcade puzzle game for the BBC Micro/Electron.

Ozzy the knight is trying to navigate through 12 Octopode worlds. On each level, Ozzy tries to capture all the marbles before the plutonium timer dissolves him. Ozzy can move in the cardinal directions, but loses a life if he touches an Octopode or falls too far. Transporters on each level move the player to a different location. The player starts with three lives, and gains a passcode to start on a higher level after passing four levels on a single playthrough.