Mr. Dig

Mr. Dig is a maze game designed by Rita Jay and published in 1984 by Microdeal for the Atari 8-bit, Commodore 64, Dragon 32/64 and TRS-80 Color Computer. The game is a direct clone of Universal's 1982 arcade Mr. Do!.
Gameplay.
The object of the game is to guide the titular "Mr. Dig" through a maze by digging tunnels, collecting cherries, and avoiding the various monsters that come out to get him. Mr. Dig can defeat them by hitting them with his bouncing "power ball" or by dropping large apples on them.
There are several types of monsters that try to prevent Mr. Dig from getting the cherries. The least threatening are simply Meanies - small characters that can only chase Mr. Dig. Their touch is deadly, but they can't tunnel behind the player - so they can be led to a dead end and trapped with one of the apples. Meanies can transform into Miners, and these creatures pose a greater threat to Mr. Dig because they can tunnel behind him and eat the apples.
The game allows the player to choose one of ten difficulty levels from "Big Baby's Level" (easy) to "Masochist's Level" (impossible).
Audio.
The game uses excerpts from Mozart's Turkish March as its main musical theme.
Reception.
The game has been met with fairly positive reviews. "Computer and Video Games" reviewer summed up "Mr. Dig" as "a really nice game from Microdeal, very playable and extremely addictive". The "Page 6" reviewer liked the game better than "Mr. Do" and concluded: "Personally, I felt that Mr. Do! was a little too hard and I think Mr. Dig will appeal to a wider range of computer gamesters."