This was nice.
Sure it's a very generic game to see on Newgrounds but you made it with some nice touches.
First off, I enjoyed the retro feel to this. Your backgrounds were great and the difficulty of the whole game was perfectly balanced. Your soundtrack was also brilliant, unlike most games you didn't just stick to the same boring song which gave a sense of progression.
You do somehow need to take this style and make it your own, it's been done so many times on Newgrounds that most games like these are mere replica's and have that same replay feeling behind them.
Besides that, great game.