Not bad pretty good.
I could suggest that you have the game a little harder and other effect not very sure as to what but this game could be improved by possible having more levels as to having them with more enemies possible a boss to escape from the very end and have some friends you meet along on the way to help you out on the escape that's all I think this game could use to be a little more fun and disserve a high score such as 10/10 and 5/5.
Other than that keep up the good work.