The game sometimes unpauses by itself. Its frustrating when you've made hard progress and it fails you coz it decided to continue by itself. Also some levels force you to use the boosters rather than just being hard on natural difficulty which sucks coz that just means they want to make you do things the way they want rather than based on your skill. And talk about ignoring some of the touches in the screen. This game has a good potential and is a good implementation for a good amount otherwise.