Not too bad for your first game
I mean it wasn't bad i suppose but what you really need to do before submitting something like a game to newgrounds is make sure its ready. have a loading screen and maybe a play button or something. I think something else you could do it make a try again button instead of just spawning back in the same place. you could also try and improve the graphics a bit and use some original music ( i have heard it in other games before). Oh and maybe make it seem like you are actually moving. other than that it really isn't too bad.