In the top left of the screen is your life meter, which decreases every time you're shot. You'll know when you've been hit because the display will flash red. The app also beeps letting you know when an opponent has been detected -- alerting you to an opportunity to strike or of approaching danger. In the bottom right hand corner is you weapon selection and ammo remaining. You can reload by pressing in the lever on the front of the weapon. Holding it down opens the weapon selection, which you'll be able to upgrade through achievements and in-app purchases. There's also a pair of triggers in the well. The front engages your shield, which prevents you from being hit, but also stop you from firing on opponents, while the primary trigger fires blasts (complete with laser beam animation and explosions) at your opponents. Check out the gallery below for a few more impressions.
Edgar Alvarez contributed to this report.