If and when I acquire the necessary expertise, the two simple but neat effects employed on the title screen will be incorporated into my own magnificent programs. But enough of daydreams - what about the game?

Simplistic in concept but effective in execution: a blue saucer is dropping bombs in a quasi-predictable fashion. By moving your shield in an intelligent manner, the city - which is scrolling by beneath you - can be protected.

Subsequent to the interception of a predetermined number of pods, the border changes colour and the pace quickens. The sonics are acceptable but a bit primitive; the yellow screen is at least a change from the usual black 'space sky'.

Most arcade aficionados with an unexpanded machine could find this a worthwhile bet, especially if competing against a friend.