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[little swift]

when the area touches a killer area the game closes

[noble wedge]

First thing..

queue_free() is a function.

Make sure you put the parentheses at the end, otherwise you're effectively just trying to access a variable that doesn't exist in this context.

[little swift]

done

now?

[noble wedge]

Second thing

Looks like it's just a spelling error

You have "is_in_gruop"

"o" and "u" need to be swapped:
is_in_group