Inside an Ace Mk2 Interceptor tank, you have been assigned a hazardous
16-stage mission. You must travel to the overrun planet of Sentinel 4, and
destroy the weapons caches the rebels have build up. They can’t be blasted
when you are right next to them, ensuring that a degree of planning and
strategy is required.

Viewed from above in levels with simple sideways scrolling, the objective on
each level is to shoot each of the weapons crates, before going through the
newly-opened exit. Guard droids must be avoided, but shooting them can leave
them inactive for a short period of time, and they can now be shot or hit to
push them in that direction, which can be used strategically to make more
paths available. There is a 2-minute time limit on each level. Every 5th level
has a nuclear weapon guarded by a seeking enemy droid, which continually
follows you.