I put together a quick guide to Office Combat in pdf form. You can find it here. The manual goes over some of the basics and then delves into each of the units and what they do.
Version 1.1 is almost ready for release. There are some exciting new features including match scores and a player ranking system.
At the end of each match your score is uploaded to the server. Points are awarded for killing units and for a win, loss, or tie. Your cumulative score is used for the ranking. In addition to viewing the top 20 ranked players, you can also view the 10 players on either side of you rank.
If you are looking for a match, consider using the ranking interface to send out challenges!