Complaining about game being different than what you guys are used to is just silly, it is sometimes annoying that you get a new layer of balls in the shot, but thats how the game was designed (purposely or not), face it.
The game itself is quite good, I love the graphics :)
But after a few minutes of flying around with auto-fire you realize that you cant really hear the music (which is actually a nice one) and the firing sound is kinda annoying :/
Wish you could have more upgrades and levels in your next game :)
keep up the good work :)