Earth Health - monitor this closely, as if this indicator decreases to no bars, the Earth is lost.

Avian attack wave indicator - the state of the attack wave - decreases as the current wave finishes

Power ups - touch power up icons when they show up to collect or use the power up.

Alien AVIANs - warp your ship into their flight path to ram them into eternity

XM-10 warpship. Touch the screen to warp the ship into the path of oncoming AVIANs.

PowerUp inventory - some power ups can be stored for later use. Simply touch the icon to use the power up. The EarthShield, EMPzapper, and PowerShield are stored here.