Electrophobes hate lightning. Draw arcs of lightning with your finger to kill the Electrophobes before they reach your egg. Deploy your lightning bomb to kill all of the Electrophobes on the screen at once!
But be careful, Electrophobes will attach to each other to form a structure as they try to smother your egg. If their structure reaches the edge of your screen you've lost.
The more Electrophobes you kill, the larger your score multiplier gets. If any of the Electrophobes attach to a structure your score multiplier gets reset to 1.00, so make sure you kill all the Electrophobes before they can attach to increase your high score.