All the challenges here are based entirely on individual performances, none of them require any sort of teamwork whatsoever.
You couldn't be more wrong here. Good communication is key. If you guys compete against each other, give each other goals, set a high score to beat, you'll have a way better chance of beating Blue. Granted you are all playing the games yourselves but without good communication, you have no idea if your score is any good or not. For example, if JeffreyRaze had told you guys last challenge he'd gotten a score of 24 million, would any of you had thought anything under a million was good? That's where the teamwork comes in.
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Indie game board: http://www.gamefaqs.com/boards/293-indie-gaming