To shoot, just aim with the mouse and click to fire one of six weapons you can use. You start with one, the blaster, and can purchase any of the others once you have the funds to do so. That's pretty much all you have to do to protect your base and try to obtain the high score. Let me know of anything you would like me to add to the game, your favorite weapon, or your favorite mob. I love to know how you are enjoying it and what you like about the game!
Updates: 8/6/2014-I implemented my logo and added it to the Sonicia Nova studio as a free game. 8/4/2014- I added a new mob called the avenger, it is the strongest mob so far (more description of the mob in the help menu.). I also perfected the help menu and I added a new achievement stating that you've killed the Titanium Warrior. When you get that achievement, a little star pops up in the top middle of the screen that says "Good Job!", which is also a new little thing that I added. 7/19/2014- I added two new guns, the laser gun and the plasma cannon, as well as two new mobs, one being a boss called the titanium warrior and the kamikaze which is another normal mob. I updated some of the art and added achievements, and a help button to give a detailed explanation of each of the mobs. Enjoy the 2.0 update! 6/28/2014- I added music, one of my favorite rhythms that I made that was going to be for a song my sister made but chose not to follow through with, so now here it is in this game. I also made the guns more expensive because it seemed it was too easy to obtain the machine gun and the bazooka. 3/26/2014- I released the game, and added blaster, tripleshot, machingun, and bazooka guns. Also added the aliens brute and wizard. The brute is blue and the wizard is blue and pink swirls. The wizard also shoots fireballs and the brute punches your base. Everything is mine. I know it is pretty much a better version of my old, lame, and sucky Spikeball's Alien Blaster, but this is a lot better than the previous version.