This focuses a bit more on the story by having a blurb after every level. Some of the middle levels are really memorable, like having to destroy various pods while being on a self-destruct timer and then seeing that timer on the walls and another one with a spacewalk. Near the end, they kind of reused a similar level five times in a row, which kind of took my enjoyment out of the game. The replacement enemy sprites, though, suck real bad and have terrible soundfx.