The missions are simple and the radar will tell you where to go in this shooter. In order to move on to the next level, you will have to kill all the enemies in each room. In order to reload your weapon, you have to hit the space bar. The "shift" key is used when you've killed all the enemies. The up and down arrows are for primary and secondary modes. "Ctrl" picks up items. Go ahead and clear all the levels and consider yourself a winner.