Software on the giant robot
can be 4 modes,
Transport:
Getting from A to B with the wheels.
Getting from A to B by bipedal motion.
Demolition:
Leveling obtrusion, surfaces that is not leveled. (Mountains, hills)
Then deepening that leveled area as far as it can reach.
(But other machines will have to make a pathway for it after certain depth is reached.
It will need to go down underground with the machines.)
Now I can add collection, but it is not advisable to have the robot directly in contact
with the surface/objects of any kind. It will shorten its lifespan dramatically,
further, it is nuclear powered.
Only contact it should have is during transport, and for transport.
Other machines for collection and processing should be automated with other, specialized machines.
Of which would be on wheels. I have designed similar before I believe...