Thanks for the constructive comments guys!
JohnnySix I didn't realize it was such an issue before, but I think you're right about the controls! I get a little confused myself, and watching one of my friends, she was really confused too. I'm not sure about making the up button for the collector because using the up button makes it that much harder to quickly move left or right. I think the controls I will go with is [x] for normal shot (this button can just be held down with the middle finger), [c] for star collector (it's more frequently used so place it where the index finger will go), and [z] for the scatter shot (less frequently used, and so can be pressed by the ring finger). I'm glad you like the choice of music :)
GenkiGenga Thanks for your nice comments! :) You're right about the instructions though. I'll see how I can work it in to the game :)
I'm definitely taking all this feedback in to account when I make my game for the HBGames + Construct 2 contest! :) Thanks!