Click to made a wall. If one ball touch your wall before being built you lose a life. Fill at least 75% of the space to progress to the next level.
The rules are simple:
Trap the J-atoms into smaller spaces in order to make at least 75 percent of the camber disappear. You can check on your progress by looking at the area cleared at the bottom of the screen.
The wallbuilder can sustain only a limited number of atomic hits. Each time it is hit, it loses one chamber life. The number of lives left is displayed in the upper-left corner of the screen. If two atoms are free in chamber, a wall in progress can be hit once. A second hit by a J-atoms ends the game. You are allowed an additional hit for each atom in the chamber. For example, at level 7, the wallbuilder can sustain six hits, with the game ending on the seventh.
A game ends when the wallbuilder is destroyed by atoms or when you run out of time.