Knuckles is a complicated program resembling Pengo. You control a character in a randomly-generated maze of graphic lumps, called roks. Individual roks can be pushed around the screen to trap or crush three monsters known as rokeaters, which chase you around. Crushed rokeaters reappear at the corners of the display unless roks are in the way, when they materialise at random. If a rok isn't free to move when pushed by the player, it disintegrates. Superficially the game resembles Pac-Man, but with a maze you create yourself.

The maze also contains magic squares - objects which you must live up vertically or horizontally before you can move on to the next level. You get bonus points for eating fruit which appears at random. At later levels you encounter white holes capable of duplicating roks and fruit.

The graphics are smooth and colourful, the sound effects are good, although the background tune (as used in Manic Miner) can be rather irritating. For some reason the monsters and the player are depicted using the graphic shapes from another Memotech game, Blobbo. There are four pages of detailed on-screen instructions.

Well-written, though rather expensive.

S.N.G.