The goal is to hit the number entered by the computer - between 3 and 10 seconds to the nearest hundredth of a thousandth of a second - or to stop it as close as possible with the red STOP button. In case you do not hit the number, the plus or minus differences will be deducted from the starting credit.

You can choose from ten different game options: practice, beginner, intermediate, professional and one undred attempts (hundredths and thousandths of a second). The ten best - in full pro mode the twenty best - players in each category can be added to the top list.

For example, in a Beginner Hundredth of a sec game, if the difference was plus or minus 0.16, 0.16 must be subtracted from 3.00 seconds, leaving 2.84 seconds left. From here, the game continues.

In the one hundred attempts games, the player with the most hits is the best. Of those who achieve the same number of total hits, the one with the most recent result is ranked higher. The game time is about thirty minutes.

A hit is when the player hits the exact number entered by the computer. In this case, you will be rewarded with +3 credit seconds and a loud fireworks display will indicate success. The game lasts until the credit seconds run out or 60 minutes have elapsed. The more total hits a player gets, the better. Intermediate Player: Starts at +2 credits per second and receives the same amount in the event of a hit. Professional player: Starts with +1 credit per second and gets the same amount in a hit. The general rules of the game are the same for all four.