Alien Attack

You must defeat 16 waves of 6 aliens to save the colony, and win 3 mother ship battles (every 6th level).

The aliens will try to knock out your laser cannon and your laser cannon energy batteries.

Your laser cannon power supply will only last for a count of 60, so each wave must be defeated within that time so that the power supply can recharge between waves, or else your laser cannon will be rendered useless.

You have a shield which can be activated by pulling down on the joystick.

The shield will last for 1 second, but cannot be activated again for 4 seconds. The shield also puts a higher drain on your power (5 units).

Left Difficulty switch toggles between multi-cannon (B) and single cannon (A) options. Can you defeat the aliens and save the colony?