To dream of playing a video game on your cellphone represents a challenge that is always on your mind. Something that feels important for you to try to overcome all the time.
Example: A man dreamed of playing cellphone games. In waking life he was spending a lot of time trying to see if he could get the city by-law officers to force each of his neighbors to make changes to their properties by writing them emails. The cellphone games reflected the challenge of writing the perfect letter to force a change to happen.