finalBoss rework
(this is pretty raw, so expect a bug and balance patch soon)
finalBoss goes invulnerable a few times as it loses health
finalBoss damage reduction is higher
finalBoss damage reduction slowly decays as you do any damage to the boss
damage reduction resets to normal with each new invulnerability phase
after each invulnerability phase it randomly adds 1 more attack mode
lasers, black hole, mines, hoppers, seekers, mobs, orbiters, oscillation
mobs die below 0.05 -> 0.01 health
might cause bugs, but testing this out
guns and field power ups show 3 -> 2 options
bug fixes:
c162f1074e