I think a statistic system is in need, Attached to your team should be a set os stats, For example:

Team: "Josh"
Games played: 27
Games Won: 20
Games Drawn: 1
Games Lost: 6
Hedgehogs Killed: 142
Hedgehogs Lost: 121
Kill/Death Ratio: 1.1 - 1

If this could be viewed in online play you'll also be able to get a rought estimate of how good your opponent is.

An extension to this should be 'levels' where you have to gain Experience to level up. This could make a 'target' for people and would also help people aspire to be the best, and would make people keep on playing for longer.

Added after 1 minuts 19 seconds:
It may not be the most origional of ideas, but it would be fun still.