I'm done with this game. All they do is take money and rewards for power ups are given by chance and not by level progression which causes ppl to have to buy stuff in order to progress. Each level has anywhere between 6 - 13 rounds in it and after round 3 the enemies are impossible to destroy without some assistance which is given rarely. Game play is boring and mini games are rigged so you keep trying to get an extra ship or whatever is offered but it's also impossible without spending money.