Good game but controls are buggy

The game is good but I have an issue with the control stick actually changing position on my screen. They sometimes move so that they are stuck at the bottom of my screen. I can sometimes get them back by flicking them up rapidly, but other times they are stuck at the bottom of my screen and I cannot even use them to move. It would be great if this bug could be fixed. For right now it is nearly unplayable for me.

KitKatCat92 about Dino Safari: Evolution