Playing in story mode, I'm impressed that you have multiplayer, chat is always interesting :P I managed a 4p game; I don't know whether blue man or green man is player 2; enemies are easy to kill; host should be allowed to kick people.
What I think you need: 1. Anti-aliasing. 2. Steering sensitivity adjustments. (@jake2k9: since when is being unable to turn while driving at 30kph realistic?) 3/5 -- it's a good start, but needs to be greatly improved.
My finally winning strategy for 1945 (1 star lol): take spotters down to nearly dead, then back planes away. Next, Tail the blimp with all planes, making sure that once in firing range, you minimize movements. Turn planes away (pref. with shield or 180) when you get very close to the back of the blimp. Rinse and repeat (spotters should be taken out when the blimp moves toward them.) 5/5 - awesome game.
I would like to be able to choose what upgrades I have assuming they've been unlocked in the story, but I understand that at certain points in time you might not be able to manufacture biological weaponry, for example. 1945 is extremely hard -- After going for the blimp it ran to the safety of spotters... I managed to kill the spotters, then used a bait technique with the shield planes, tailing with the superspeed planes, but eventually the blimp killed all my planes. I ended up with blimp having 1/4 health and spotters dead. Too hard :P
For all the people who can`t figure out the powerup: Hover over the move icon and click the SuperSpeed powerup. You'd think that with a giant arrow pointing to it, most people would get it.
Tip: turn off your speakers and the music won't distract. I got to the very top one where I failed. (Try starting out on an edge instead of the centre =)) 4/5
Draco: You don't get on the roof; you set a fire in the fireplace. There's a clue for that. The acorns are annoying, true. The honey-doll is after you kill the bees. This game was actually extremely easy and the art and sound were good. 5/5