Click "Start" after game has been loaded. Then click "Player" button from coming menu screen to choose your fighter and re-click "Start" to start the game. You can configure the game as "2 Players Mode" by clicking "None" while selecting fighter. To navigate your fighter, use arrow keys from keyboard and to make a movement use left mouse click or enter key. If you play the game as "2 Players Mode" use W,A,S,D keys and "Space" or "Y" key to make a movement. Have fun!