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.