Make the speed of Tween editable

CharTween.gd

@@ -1,6 +1,6 @@
 extends Tween
 
-var duration = 0.75
+export var duration = 0.75
 
 # Called when the node enters the scene tree for the first time.
 func _ready():

Player.tscn

@@ -51,3 +51,4 @@ __meta__ = {
 
 [node name="Tween" type="Tween" parent="."]
 script = ExtResource( 3 )
+duration = 0.25