Was doing a godot game according to tutorial...
IT'S WORKING!!!
(btw, that bug makes for a much more interesting gameplay.)
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I think most of it was clear, except for this bit...
https://www.youtube.com/watch?v=QEaC3PVEhOU
var prev_tail = get_child(get_child_count()-1)
I have no idea how the child system works yet
