switch to less stuttery timing method

Scenes/Play.tscn

@@ -61,7 +61,7 @@ uv1_scale = Vector3(-1, 1, 1)
 [sub_resource type="ViewportTexture" id="ViewportTexture_w20vk"]
 viewport_path = NodePath("Mask")
 
-[sub_resource type="ShaderMaterial" id="ShaderMaterial_bs53h"]
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_osg3y"]
 resource_local_to_scene = true
 shader = ExtResource("3_rjbyl")
 shader_parameter/mask = SubResource("ViewportTexture_w20vk")
@@ -140,7 +140,7 @@ anchor_mode = 0
 editor_draw_screen = false
 
 [node name="Background" parent="2D Viewport/Viewport Control" instance=ExtResource("2_8g6gv")]
-material = SubResource("ShaderMaterial_bs53h")
+material = SubResource("ShaderMaterial_osg3y")
 layout_mode = 1
 offset_top = -1920.0
 offset_right = 1920.0
@@ -187,8 +187,8 @@ layout_mode = 1
 anchors_preset = 2
 anchor_top = 1.0
 anchor_bottom = 1.0
-offset_top = -1820.0
-offset_bottom = -1820.0
+offset_top = -1920.0
+offset_bottom = -1920.0
 grow_vertical = 0
 
 [node name="ViewportView Left" type="SubViewportContainer" parent="2D Viewport/Viewport Control"]
@@ -232,21 +232,14 @@ position = Vector2(0, -1920)
 offset = Vector2(1921, 1920)
 anchor_mode = 0
 
-[node name="ViewportView" type="SubViewportContainer" parent="."]
-modulate = Color(1, 1, 1, 0.329412)
-anchors_preset = 7
-anchor_left = 0.5
-anchor_top = 1.0
-anchor_right = 0.5
-anchor_bottom = 1.0
-offset_left = -960.0
-offset_top = -1920.0
-offset_right = 960.0
-grow_horizontal = 2
-grow_vertical = 0
-
 [node name="AudioStreamPlayer BGM" type="AudioStreamPlayer" parent="."]
 script = ExtResource("4_c2dke")
 
 [node name="AudioStreamPlayer SFX" type="AudioStreamPlayer" parent="."]
 script = ExtResource("5_owrd5")
+
+[node name="Dev Area" type="Control" parent="."]
+layout_mode = 3
+anchors_preset = 0
+offset_right = 1920.0
+offset_bottom = 1920.0