Nasty doesn't even begin to describe Jet Power Jack. Only an hour at the keys and I was reduced to a slobbering wreck who had to be physically restrained from putting a boot through the screen. It's one of those games where you control a little man with a jet pack. Poor old Jack has been caught by Nogrob the Terrible and unceremoniously dumped in a space garage.
You have controls for left, right and thrust to go up and you manoeuvre him around, avoiding the ever-vigilant Space Googjies, picking up fuel pods to take back to his spaceship. Sounds easy? Not a bit of it. The walls are all electrified and touching them means instant incineration. You also have very little room to move around in and this makes it an absolute nightmare. I spent hours smashing the unfortunate Jack into walls until I finally gave up.
Unless you're a hardened games freak, used to scores like telephone numbers then keep a strait-jacket handy.