Hangnabits or Ice cavern?

Which should I go to first: the Hangnabit level and the levels it leads to, or the ice caverns? Does it matter?

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doesn't matter, but in the hanibits one, you get a hangglider 🆒

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"Sometimes I think that the surrest sign that there intellegent life elsewhere in the universe is that none of it has tried to contact us."
-GeX