I found this to just be a mediocre game. What I did not understand about it was how dull it was. It was mostly just the same enemies coming back and forth. I needed more kinds of weapons. I did think the powerups were pretty good. I kind of think Britney Spears child jokes are old at this point.
The graphics aren't that good either. I guess the sounds aren't too bad. It's just nothing that original. I'm not very good at this either. The music is actually fairly decent.