This program is well-packaged in a presentation type case with a concise and simple, twelve-page instruction booklet. Its stated aim is to supplement school work on number bonds in an interesting and exciting way, which means that the player must already have some ability in simple mental arithmetic with the four rules of number.
The recommended age range is from five to twelve, although it has proved interesting (and no doubt useful!) to pupils up to sixteen!
The program has two sections, a test option or the game itself, which can be played from the keyboard or by joystick. Two numbers are displayed at the top of the playing area in boxes. The left-hand number is the number you are trying to make the right-hand number equal to.
Spread around the screen are numbers and signs (5+, 2/, 4-, etc.) and by guiding your "gulper" to these you change the right-hand number accordingly. You have three lives and succeeding with at least two advances you to a higher level.