Chicago Reader review:
'E.T. with the lid off (1984). At the center of this horror comedy is a tidy family parable of the kind so dear to the heart of producer Steven Spielberg: the cute little whatzits who turn into marauding monsters when they pass through puberty (here gooily envisioned as "the larval stage") are clearly metaphors for children, and the teenager (Zach Galligan) whose lapse of responsibility unleashes the onslaught is a stand-in for the immature parents of the 80s (Poltergeist). But Spielberg's finger wagging is overwhelmed by Joe Dante's roaring, undisciplined direction, which (sometimes through sheer sloppiness) pushes the imagery to unforeseen, untidy, and ultimately disturbing extremes. Dante is perhaps the first filmmaker since Frank Tashlin to base his style on the formal free-for-all of animated cartoons; he is also utterly heartless.'
Here and (above) is the trailer.