New Robo running back and forth

[Rhea101]

Hello all.
Yesterday we purchased a Robo from petco. It is currently in a 20 gal tank with a wheel, a house, and food/water, and toys. It was doing ok and checking out its surroundings when it first woke up, but after we moved a the wheel around, the hamsters has just been running around one section of the wall back and forth and standing on its legs. Sometimes he stops to climb other things.

Back at Petco, it was in a small tank with 2 other hamsters. I’m worried about him running back and forth constantly. Is he just spooked by his new home? Or is there something wrong with him, and what can we do? How long until this becomes a problem? Any advice is appreciated!