• Press M to select the game type (display shows P1 to P8). For a single player, choose P5.
• Press N to start the game. It shows your starting position.
• Press the button corresponding to that position. It then shows the ending position.
• You need to choose a horizontal or vertical adjacent position to move to. Press that button.
• You get a sound to indicate right or wrong (the sound is obvious).
• When you reach the ending position you get another sound.

Here's the Amaze-a-tron Manual.