Each cell in the Gameboard has a Pebble in it. Each Pebble indicatez the number of similarly colored Pebblez directly touching it (except for those on the edgez, each Pebble can touch up to 8 otherz). Gray Pebblez haven't yet been marked yet.
For example, the Pebble with the blue 0 in the upper left indicates that it touchez no other blue Pebblez. The red 2 next to it has already been marked; the 3'z below it have not, but must be red if this game only involvez the colorz red and blue (see the Toolbox below).
The Toolbox contains Markers that indicate what colorz are used in this game (in this case red and blue), as well as how many of each of the colorz are still unmarked in the Gameboard. In this example, there are 15 unmarked redz left, and 25 unmarked bluez left.
There are two wayz to mark Pebblez:
You'll earn Pebblez Cash (Pz) for correctly marked Pebblez, and lose Pz for incorrectly marked onez.
As you play the game, additional featurez will be appear, but they'll be introduced by videoz as they're relevant.