On the latest build, I battled a friends 'auto defense' while they were offline, I won the match with no fatalities but still lost four worms from my total.

Yes, I agree; you should only lose a reinforcement(s) when they are killed..

Hey guys, thanks for your thoughts. At the minute the reinforcements act as our "energy" system like in other Facebook games. However, your ideas here are very interesting. I'm not sure how it would affect the balance of the game (even though it's free to play, we still need to make some money somehow so we can get paid and keep making/improving it for you guys ;) ) but I will definately be forwarding your suggestions to the team.

The way it works at the minute is a game costs you 4 reinforcements & a challenge costs 1. You do get some refunded if an opponent quits on you mid-battle however. Reinforcements can be purchased with Credits or coins, picked up once per day via Visiting Friend's and filled up via Levelling up.