Digger

Coax the monsters down holes that have been dug in the walkways, without being killed yourself. There are bags of gold stashed at the top left of the screen. You can get bonus points by carrying the bags down to the bank, at the bottom right of the screen. You move twice as fast as the monsters except when you are carrying a bag of gold. The oxygen slowly is exhausted show by a bar at the top of the screen. To kill a monster, you must dig a hole, coax a monster to fill the hole and fill it in before the monster escapes in 10 seconds. Red monsters need to fall one level, green 2 and yellow need to fall 3 levels.