Added hidden block at the end of tutorial

world.tscn

@@ -605,6 +605,11 @@ visible = true
 position = Vector2(-1806, -161.48367)
 rotation = 0.0
 
+[node name="HiddenVerticalLongBlock13" parent="." unique_id=399713421 instance=ExtResource("20_26xuy")]
+visible = true
+position = Vector2(-1509, -69.91062)
+rotation = 0.0
+
 [node name="HiddenVerticalLongBlock12" parent="." unique_id=225495194 instance=ExtResource("20_26xuy")]
 visible = true
 position = Vector2(-2003, -321.98273)