I rated this app three stars because I liked it but there were minor issues. It lagged a tiny bit. It wasnt really a problem, and it only happens occasionally. Plus, its a little hard to draw the lines, and you might have to push a little harder on the screen than needed. The issues might just be me, as I can get very OCD about things, and Im sure theyll fix it. Overall its a good, fun, and brain teasing game!