Stuck on Hubble – Star Walk Kids: Astronomy Game Review

My daughter and I are stuck on the Hubble Telescope on the exploration map. We have no options to continue and are unable to journey to the next locked item. Also, when we select settings, we are asked to solve a math problem, but are unable to continue by tapping “Restore”. Help!
Review by AstronomyDad on Star Walk Kids: Astronomy Game.