For IOS on the hopscotch app there is a bug that causes the screen to get messed up when you try to switch orientations.
I have found a temporary fix for this bug hopefully it will help
The screen starts like this
Then I tilt it one way and it does this
Then I Tilt it back.
Then I tilt it again and it works.
If this does not work try tilting one way and then turning your phone 180 degrees all the way around that also works.
Hope this helps.