I DO NOT TAKE CREDIT FOR MUSIC!!! MUSIC WAS COMPOSED BY JOEL NIELSEN AND IS FROM BLACK MESA: SOURCE!!! I ONLY EXTENDED THE SONG!!!
WASD to move, SPACE BAR to fire. This is a multiplayer game.
UPDATE: This game is no longer being developed, but there is some good news. Me and a friend are creating a whole new game based off of this one. You can check it out here: http://flowlab.io/game/play/1102297