How to get the value of a variable from another scene ?

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:bust_in_silhouette: Reply From: AiTechEye 
get_tree().get_root().get_node("Spatial/node1/node2").get("variable")

The other way is by adding the scenes in [project settings] > [AutoLoad]

so, if you adds level 1, and name it to level1, then you can get access to it like:

level1.get_node("node1").get("coins_variable")