This is a bowl of popcorn.
LOOK AT IT!
I prefer my popcorn plain. It is much easier to grab a bite and continue working if I don’t feel the need to wipe the butter off of my hands every time.
The driver can exit the vehicle, pick up some mineral, return it, and go back out for more. He can’t pick up more than one mineral at a time.
Oh, he also can’t leave the level without the tank.
Next: adding monsters to their lairs. For lack of time, the AI will have to be very simple. It will cheat and chase the driver through walls. Hopefully they’ll look more like monsters than spheres of a different color. B-)