With Impulse, your goal is to remove tile sets containing three or more of the same color. A set is created by adjacent tiles (not diagonal). The larger these sets become, the more points they are worth. However, if you allow the stacks to grow out of control, it may be too difficult to clear them fast enough. If you are able to remove 10 or more tiles in one set, big points are awarded. Also, you will find some helpful bombs along the way, use them wisely.
Think fast, trust your instincts, and pray your last Impulse was correct!