really good game but way to easy
I must admit that the graphic are good , the game play is awsome VERY addictive game but ... way too easy , thing is the upgrade give the player way to much power , when you can buy the three missile upgrade the fun is over , i was just randomly shooting in the sky and i was killing everything that was trying to get in the screen... :P also buying the three missile come with a price , you get way less money because you get a lot less combo...
Anyway thats was my 2 cent , very good game , if you think of improvement think of new enemy and new boss. Think of an enemy that could freeze your gun or shield , or even disable the shield for a period of time.