As good as ever.
It's just as awesome as ever. Not much new stuff in the sequel, but then not much needed to be changed. It's still lots of fun, still has great music, and the new additions are all pretty good. The upgrade system is a little bit complicated... I don't know if it needed all the extra stuff besides the Star Magnet and the Star Storm or whatever that was called. Being able to change the color of your ship was a nice touch (should have been free, though).
I felt stuff cost too much. Graphics didn't always look quite as pretty as I remember them from the original. But overall, even though I'm not certain a sequel was altogether necessary, it's well-deserving of an 8/10; 5/5.