I can't see the whole board
What do you do when you can't see the whole board? That is, after the screen magnifies during the the pig city is build, you can't shrink it to see the whole field. This seems to happen a lot, and when you scroll to the slingshot, you can't see what you are aiming at. Restarting the game doesn't seem to help.
Is this an intentional part of the difficulty?