Slide the cartridge in your beloved Home Computer, the one that boots in no time, and then get a hold of your joystick. Press 2 to select the game.
 
Now after an intro screen, you’ll have to maneuver a mouse pointer around the screen, and then try and hit a square. This probably takes some getting used to, but as you know, practice makes master.
 
You hit the square using the fire button. You can slide in front of the square and hit fire just at the right moment. You might even utilize the bouncy bump, - when the mousy thingy gets edgy.
 
The registration point of the mouse is the upper left of the white color of the pointer. Just as was default on the Amiga anno 1987.
 
Each time you hit a square, a new square will emerge. The color combination will be different and often the square itself will get smaller.
 
If you are quick to hit the square, you will be awarded a good number of points. If you wait around forever, your score may be as low as only 1 point.
 
If you hit outside the square, it’s game over. Just like that.
 
Theoretically you could get a high score of 1,900. But a score above 500 is more than okay.
 
You can memorize the patterns at which the squares appear, and get closer to a super high score.
 
50 amazing and carefully balanced levels of immense tension. It was 100 levels, but my neck and shoulder told me otherwise.