Vernier Key

This is an educational and entertaining game where players use calipers to match nuts with bolts to open safes and obtain copper, silver, and gold coins. It is suitable for leisure and amusement for both children and adults, fostering intellectual development, enhancing adaptability, and inspiring enthusiasm and ambition for creating wealth and saving the populace.

The game comprises six levels: the first and second levels involve opening copper safes to acquire copper coins; the third and fourth levels require opening silver safes to earn silver coins; and the fifth and sixth levels entail opening gold safes to gain gold coins. As the game progresses to higher levels, the time limit decreases, and the precision required for matching nuts with bolts increases. Players must accurately measure the inner diameter of the nut and the outer diameter of the bolt, or the depth of the nut's hole and the length of the bolt, using calipers, and then pair and join all nuts with bolts within the stipulated time. If the time limit is exceeded or a mismatch occurs, it triggers a time bomb explosion, destroying the safe.

The calipers in the game are used to measure the inner diameter and hole depth of nuts, as well as the diameter and length of bolts. A magnifying glass can be employed for clearer viewing of the caliper's scale or for aligning the bolt with the hole in the center of the nut before insertion. When inserting the nut, it is necessary to move the bolt or nut up, down, left, or right until they are properly aligned for successful insertion.