Just got it. Be sure to start on the Beginner difficulty. Normal is way to intense. I also like start in 2D. Some slow down on the game when alot of enemy ships are on screen. Some issues. Boring levels... game speeds up in the middle of play. (not sure why). It's like it is catching up. Game play is not consistent throught-out play. App needs some fine-tuning. I would wait before spending the $2.99. I have hope the dev will correct some of the issues.