Mini-Munchman was a handheld version of Munchman.

It was first produced in 1981 and also incorporated a watch, stop-watch, lap-timer, day/date & alarm.

The object of the game was to move around the maze eating pieces of fruit while avoiding ghosts.

Mini-Munchman was powered by 2 LR44 button batteries.

There is an article on Wikipedia relating to Mini-Munchman.