I don't know how this game works, but it's completely horrible. Sorry, but when I can put unconnected random pieces to affect whether a bridge will fail or not, something is wrong. The later levels are based on a lot of luck :/
for some reason, the signalling options don't work for me. i have the officer and the signaller, but when i call for aerial support or artillery, the signaller just does the animation, but no tactical points deduction and no attack
 "Bullseye (Interstellar Marines)"){kind=icon}
 "Wonderputt"){kind=icon}
 "The Sagittarian 3"){kind=icon}
 "How to Raise a Dragon"){kind=icon}
 "Cargo Bridge"){kind=icon}
 "Mud and Blood 2"){kind=icon}