Now I see that the quality has improved and you have polished it a lot.
I didn't play all the game but I can give you a more couple of suggestions.
The you go to the left you see the black border.. I suggest to put a limit on the camera movements.. when you go near the border the player moves but the camera stops and you cannot see the borders.. (similar you can do when you go down).
For the rest I think if you animate a little bit the other player will improve it .. also you can add a little shadow to the player (you can add a spriet with negative scale Y and a color black with low alpha )..