Yesterday, I played this... "51 ships destroyed"
...
Today, final boss, I keep losing lives... Only one left and the moment I lost it, the boss was destroyed too.
You saved Earth.
How to kill a void eater? Stick somewhat close to it, wait until it starts to charge it's lazor, then splat it. Watch out for the "killzone".
How to kill a gray? Slash it when it shoots it's lance. Takes 3 slashes to splat (1 with razor glaive). Only vulnerable when shooting it's lance.
Wooo!