First Suggestion: Most of the newcomers are either confused about the game or simply don't know how to play, I suggest a Training Field for the newbies, I don't really know how to explain, make a specific map for training for example. You could even put the Training Field in this area:
Second Suggestion: A proper CS2D tutorial for the newcomers
Third Suggestion: In the next CS2D update, implement a program that searches and analyzes .dll and .exe programs and checks if they are cs2d hacks or not, that should decrease the amount of hackers