I haven't played your game yet, it's downloading but i'd like to help you improve it.
EDIT : it's downloaded now and i've logged in. i see only 1 test server. You need to get more servers :P
Well, you should try making small games first (by small games, i don't mean 2D or 'small' games).Try singleplayer games first. Ask other devs/programmers to play your game. If they're interested or wanna add more to the game , get their help too. constantly keep searching for what's new/trending in survival games. the main thing is your audience. Don't perform in an empty hall. Advertise your game as much as possible. that's all i gotta say. :D
This might help you > http://wannabe.urustar.net/