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Game Map
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The game map is a linked list of nodes. Traveling to the next node requires selecting a valid road from your current node.
There can be 2-3 roads to choose from, but they all end up at the same location.

Instance variables
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Name               Type                        Description
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head               :doc:`./Node`                The node the contract starts at
current_node       :doc:`./Node`                The node you are currently at
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