I beat the first part of the "star game " in castle town in that huge tent. I dont know how to beat it the second time though. What do I have to do?

You need to come back after you've completed the City In The Sky temple. There you will find . You need that item to win the game the second time. It's much easier than the first time, though.

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Well, ya don't need it.

It's good to have though!