The game is ok, but as others mentioned there are several problems here:
1. I also died lots of times when touching a rocket after picking up a fire power up;
2. 100 and 200 coins medals are not being awarded at all;
3. I counted the rockets destroyed, but the medal also was not awarded;
4. The scoreboards do not work for me at all;
5. I am also sure that the coding of your game spams the NG API with requests. There is one obvious symptom for that, noticeable from player's side: after you finish a round if you click on high scores or any of the medals nothing happens for even nearly a minute. This is also probably why NG API goes nuts and fails to award most of the medals properly.