Terminal Velocity/YMMV


 * Demonic Spiders: The Hydro-sleds from Centauri III with their nearly unavoidable lasers able to kill you in 15-20 shots, which is not a lot, but considering there is always more than one sled it quickly becomes a Bullet Hell. It doesn't help that you start the level without any of your previous weapons to strafe around them and kill them quickly. After the first mission however, they either shoot at the ground or in your opposite direction which make the rest of the level a breeze.
 * Idiot Plot: After you read the briefing of the bonus mission, it's revealed that the supercomputer that ravaged the Earth went mad because it digitized a janitor instead of its normal input media.