Particles are widgets with random effects, is simulated in computer graphics technology to achieve a particular phenomenon: such as explosions, fireworks, water and other effects. For games, artist can create cool particle effects, making the scene richer.
In order to have a nice effect, the game will use a lot of particle effects, in the official example, we are in a position to display gold and diamonds, the use of particle effects to highlight them:
You can import a specific effect of particle files (plist file):
(1) Drag the file from the to particle properties
(2) In the Properties panel "feature", click "Import particles file" button, select the file to import;
(3) Select the right choice particle controls on the canvas "Setting particle File" and select the file to import.