Meatballs meets Lord Of The Flies. This trailer gets really good about 1:45 in when we get some great lyp synched rock. I swear they are singing "She just wants my beef baloney", or maybe "beefaroni". Dude. Amazing.
Right at this time there is a shift in marketing style - they seemingly wanted to market this as a serious drama for the first half but quickly change to teenage sex comedy style before ramping up the action aspect. Very strange stuff and somewhat mean-spirited. For 80's completists only.