It's pretty good.
I've been seeing a lot of games like this lately so it's nothing really too great. I do however enjoy these kinds of games.
Design 9/10
I like the old school theme to it.
Originality 6/10
It's good, but like I said: I've seen this kind of game so many times it's insane. lol
That's all that I have to give you help on. I don't really think that this is all you have. Maybe come out with some player packs or maybe a second game. With more levels. Look forward to it, I do, eh wot!