This whole film looks like a bad eighties music video.  Adam and the Ants do Mad Max.

So...  Some guys find a lost island full of punk types.  An evil chap puts on a stupid transparent plastic skull mask.  A lot of shooting and explosions occur.  A sphinx statue shoots lasers from it's eyes, the plastic skull mask is smashed, and they find a young woman sitting in an early Doctor Who set.  Then they drive off in a bus and escape in a helicopter.  Hasn't the trailer shown us the whole film in a heavily condensed form?

Favourite bit:  Near the end, where some twit rides his bike off a jetty on purpose.