I also found out (not seeing anyone mentioned it) the screen is zoom-able. That helps with lvl7 where the 2nd piggy is hard to see. (you still can't see it. Maybe the zooming was always available, but I never realize until now.

If you slide up at the left or right edge of your screen to zooms out and slide down for zooming in.

It's almost like the touch pad on the notebook where the right edge of the pad is for scrolling.