Less costing upgrades, cause' I need 5-7 runs to upgrade something. More "participation", cause' I just launch at maximum, press "S", wait until it goes off, press "A", cslow click the squirrel many times and wait.
For 'defend-the-bla-bla-bla" missions, I recommend using lots of Repair Stations and Missile Launcher. Create Solar Stations to 'unite' things, not Energy Relays. Solar Stations create energy. And mine a lot, if you have asteroids near you.
 "Pandemic: American Swine"){kind=icon}
 "Ultimate Assassin 2"){kind=icon}
 "Fly Squirrel Fly"){kind=icon}
 "Copy Cat"){kind=icon}
 "Frantic 2"){kind=icon}
 "Blocks With Letters On"){kind=icon}
 "Shadez 2: Battle for Earth"){kind=icon}
 "The Space Game: Missions"){kind=icon}
 "Epic War 3"){kind=icon}
 "Red Remover"){kind=icon}
 "Luminara"){kind=icon}
 "Pumpkin Remover"){kind=icon}
 "Take Your Canvas Bags To The Supermarket."){kind=icon}
 "The Gun Game"){kind=icon}
 "Idle Weapons Master 2"){kind=icon}
 "MoneySeize"){kind=icon}
 "Obechi"){kind=icon}