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you should add some means of control over the fligth(with arrow keys or something). As it is it's like watching a movie. A boring one.
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scale of prices don't really seem to match up to how much money is coming in. Paying $1250 for a launcher but having it's benefit be barely noticable on how much is coming in just seems like a bad investment.
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ye like phoenix said, but also it would be better if you made it hard to get a good launch, perhaps you could involve timing too. But anyway its a pretty good game 4/5 :p