I am using an iPad 2 with the latest iOS update. I really like this game, but, the controls need work. When I set the controls to use a tap to release a ball, it will often and repeatedly not release the ball making the timing very bad and frustrating. So, it helped when I changed to releasing the ball when I let up instead of tapping. However, that meant that I needed to switch to using the second find to cycle through the ball colors and now the 2nd touch will often and repeatedly not switch to the next ball color--also frustrating though a little less so than when the tap didnt release the ball. Will give more stars when controls work consistently.