[Donut]

How about different bonus goals? There are 2 or 3 goals for each team (or 3 or 4 goals for both teams), and the light randomly turns on above one of these goals, indicating everything scored in it is worth double. To make it even more fun the "bonus goal" could change every 30 seconds.

OR... there are at least 2 goals with an undesignated team color, and the lights above these goals will change to indicate which team they will score for. Imagine having to chase all over the field to score because your goal keeps moving!