I guess its not horrible, but its not good
It's too short, and the time limit is annoying. It should actually display the time left, and it should also have difficulty levels that increase or decrease the time. The guy doesn't look any different when he's in the air, and also he runs when moving in the air. That shouldn't even be that hard to fix, it's just careless programming.
That said, I can definitely see little kids enjoying this; submit it to some little kids gaming site or somewhere like miniclip, or just put it on your own toys site. Newgrounds really isn't the right place for this.