initial stab at disk 3 area.

Also made hidden items visible by default since they will become hidden when the game starts anyway. This way they are visible in the editor.

hidden_horizontal_long_block.tscn

@@ -3,8 +3,8 @@
 [ext_resource type="Script" uid="uid://dcesonmhay5vo" path="res://hidden_vertical_long_block.gd" id="1_llak8"]
 [ext_resource type="PackedScene" uid="uid://ckqable762x8v" path="res://block.tscn" id="2_se82m"]
 
-[node name="HiddenHorizontalLongBlock" type="RigidBody2D" unique_id=925152188]
-visible = false
+[node name="HiddenHorizontalLongBlock" type="RigidBody2D" unique_id=925152188 groups=["Hidden"]]
+modulate = Color(0, 0.54509807, 0.54509807, 1)
 rotation = 3.1415927
 gravity_scale = 0.0
 freeze = true