I caught this film once on late night cable TV (the place to find all good Troma films). Shot on 16mm and video, it was obviously made sometime in the early-mid 80's (judging by the fashion, soundtrack and 'music video' references). This begs the question why wasn't it released until 1993?
It's a real fan's homage to 'Plan 9 From Outer Space' (1959) and 50's sci-fi schlock. Although some of the jokes fall flat 'Space Zombie' has an offbeat charm that will grab your attention. The washed out faded look of the print makes you feel that it's the genuine article, the gore is Herschell Gordon Lewis at his cheapest and the humor directed to the low budget nature of the film works much better than it does on 'Attack of the Killer Tomatoes!' (1978) and the over rated 'Schlock' (1973).