The plot of this movie is based on a supposed UFO crash that occurred in 1897 in Aurora, Texas (now debunked by most people who study the subject of UFO's) where it is claimed a UFO hit a windmill and the pilot was given a "Christian Burial" by the townsfolk of the Texas Community. (Such stories were common in 1897, where reporters just made stuff up rather than actually report the news, unlike what happens today cough:not really:Cough)
The plot, such as it is, is confused and non-linear. The acting is sub-par at best.
It starred Spanky McFarland of Little Rascals fame in one of his few adult roles (and proves why the guy's career ended at puberty). It also starred a young actor who got the role of the alien because of the Make A Wish foundation and his condition of premature aging.
The Special Effects are laughable. (You can tell the "Flying Saucer" was in fact a vehicle lifted on some kind of crane.)
How the guys at Mystery Science Theatre missed this one is beyond me. It was right up their alley.