A friendly customer has tried this game on his Kindle and informed me about some issues with the scrolling mechanism.
That was a little bit my fault because I've tested the game on a tablet and that means my pixels are relativly big. On smaller devices the scrolling was triggered to fast and that resulted in problems when a click was triggered as a scrolling attempt.
Same was true for the sliders which you use to setup the desired field-size. I have completly adjusted the mechanisms for that and it now work flawlessly ;-)