This is a difficult and intriguing game for the unexpanded TI. You must collect eight gems that are located along the screen. Only when all have been recovered can you enter the transporter that takes you on to a different layout.

The problem is how to reach the gems. There seems to be only one route possible.

Bricks are safe enough to walk on, but footrests have the alarming habit of starting to disappear while you are standing on them. Loitering tOO long on these may mean you are unable to use them on a planned return visit.

If all this weren't overwhelming enough, another factor is involved - your oxygen supply. A meter at the top of the screen indicates oxygen consumption. Should this run out before you reach the transporter, or you fall too far, then it's back to the beginning yet again.

There are two versions of the game on tape. One uses the keyboard to control movement, the other requires a joystick: each works adequately.

J.W.