Pretty Good
I enjoyed playing this quite a bit. The game was smooth and the graphics were nice. And I particularly enjoyed your level variation, what with guns and all that stuff. The movement was easy to control and not too hard to get a hold of.
I didn't quite like the blinking though everytime I collected a star. Especially when you're on a roll and you're going really fast, the blinking actually makes it harder to see where you are and easier to collide into small tiny corners in certain areas. I think that's quite an unnecessary effect. Especially since you've got a slight magnetic pull on the stars already so I don't really need an indication that I've collected one.
And also I'm a little bugged about the controls during the menus and between each level. Firstly, I think you should just let levels go continually instead of having to click each level everytime. And also, try to keep the interface in a single controller - mouse or keyboard. It's really weird having to click some stuff while others can be done with the spacebar. It makes for much more economic gameplay if everything can be done from a single unit. It's a small problem, but I found it annoying after every level where I had to click the 'skip' button and click the level I wanted. And then back onto the arrow keys for the level.
A couple of new twists on an old concept which makes it a good replay, but you could do with some minor tweaks here and there.