Added some inital sound effects. BladeSaw turned into it's own scene, given audio, and had it's ease in and ease out effects tweaked.

.import/click.wav-15f0a8bac0191e01d61291a7ee455683.md5

+source_md5="46fbf6805e08cb6849da372142616004"
+dest_md5="e3ffdf1efc23d39f58ec547ccf1f22e2"
+

.import/generator1.wav-7c89107f0246adc6370d751013550dff.md5

+source_md5="9e6a5db548a8dcb68eaf7a61f5306be0"
+dest_md5="888d8a15176062672504ce8798441c32"
+

.import/saw.wav-4d391556f8ccb707f189b4b5bb477e2e.md5

+source_md5="f0743de1cdb38cc41380a7d43356a333"
+dest_md5="617415b36dd7764c9c8056ad6202a961"
+

Data/Objects/BladeSaw.tscn

+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://Data/Scripts/BladeSaw.gd" type="Script" id=1]
+[ext_resource path="res://Data/Graphics/nstar.png" type="Texture" id=2]
+[ext_resource path="res://Data/Sound/Effects/saw.wav" type="AudioStream" id=3]
+
+[node name="BladeSaw" type="KinematicBody2D"]
+collision_layer = 2
+script = ExtResource( 1 )
+degrees_per_second = 270.0
+
+[node name="audio" type="AudioStreamPlayer2D" parent="."]
+stream = ExtResource( 3 )
+max_distance = 512.0
+
+[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="."]
+position = Vector2( 0.291977, -0.407814 )
+polygon = PoolVector2Array( -0.190857, -62.8828, 15.1022, -32.9085, 45.8921, -43.1038, 35.9007, -11.7022, 63.632, 2.77521, 33.6577, 17.4565, 43.2413, 46.2074, 13.4709, 37.2355, 0.0130463, 63.9473, -13.8526, 37.4394, -43.623, 46.6152, -34.0394, 17.8643, -64.0137, 2.5713, -36.0785, -11.4983, -47.0894, -43.3077, -15.4839, -32.9085 )
+
+[node name="Sprite" type="Sprite" parent="."]
+modulate = Color( 0.705882, 0.705882, 0.705882, 1 )
+texture = ExtResource( 2 )

Data/Scenes/World.tscn

-[gd_scene load_steps=8 format=2]
+[gd_scene load_steps=9 format=2]
 
 [ext_resource path="res://Data/Objects/PulseArrow.tscn" type="PackedScene" id=1]
 [ext_resource path="res://Data/Objects/Player.tscn" type="PackedScene" id=2]
 [ext_resource path="res://Data/Objects/Liquid.tscn" type="PackedScene" id=3]
 [ext_resource path="res://Data/Graphics/placeholder.png" type="Texture" id=4]
-[ext_resource path="res://Data/Scripts/BladeSaw.gd" type="Script" id=5]
-[ext_resource path="res://Data/Graphics/nstar.png" type="Texture" id=6]
+[ext_resource path="res://Data/Objects/BladeSaw.tscn" type="PackedScene" id=5]
+[ext_resource path="res://Data/Toggler.gd" type="Script" id=6]
 
 [sub_resource type="RectangleShape2D" id=1]
 extents = Vector2( 32, 32 )
 
+[sub_resource type="RectangleShape2D" id=2]
+extents = Vector2( 32, 32 )
+
 [node name="World" type="Node2D"]
 
 [node name="Player" parent="." instance=ExtResource( 2 )]
 scale = Vector2( 0.1, 0.1 )
 pulse_color = Color( 0.356863, 0.960784, 0.211765, 1 )
 
-[node name="BladeSaw" type="KinematicBody2D" parent="."]
-position = Vector2( 252.7, 41.8 )
-collision_layer = 2
-script = ExtResource( 5 )
-degrees_per_second = 180.0
-active = false
+[node name="BladeSaw" parent="." instance=ExtResource( 5 )]
+position = Vector2( 271.339, 28.5271 )
 
-[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="BladeSaw"]
-position = Vector2( 0.291977, -0.407814 )
-polygon = PoolVector2Array( -0.190857, -62.8828, 15.1022, -32.9085, 45.8921, -43.1038, 35.9007, -11.7022, 63.632, 2.77521, 33.6577, 17.4565, 43.2413, 46.2074, 13.4709, 37.2355, 0.0130463, 63.9473, -13.8526, 37.4394, -43.623, 46.6152, -34.0394, 17.8643, -64.0137, 2.5713, -36.0785, -11.4983, -47.0894, -43.3077, -15.4839, -32.9085 )
+[node name="Toggler" type="Node2D" parent="."]
+script = ExtResource( 6 )
 
-[node name="Sprite" type="Sprite" parent="BladeSaw"]
-texture = ExtResource( 6 )
+[node name="Area2D" type="Area2D" parent="Toggler"]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Toggler/Area2D"]
+shape = SubResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="Toggler"]
+modulate = Color( 0.996078, 0.815686, 0.815686, 1 )
+texture = ExtResource( 4 )
+[connection signal="body_entered" from="Toggler/Area2D" to="Toggler" method="_on_Area2D_body_entered"]

Data/Scripts/BladeSaw.gd

 var _easing = 0.0
 var _running = false
 
+var _volume_on = 0
+var _pitch_on = 1.0
+
 
 func _set_active(b):
 	if active != b:
 
 # Called when the node enters the scene tree for the first time.
 func _ready():
+	_volume_on = $audio.volume_db
+	_pitch_on = $audio.pitch_scale
 	set_physics_process(true)
 	if active and _easing == 0.0:
 		_running = true
 			_easing_in = false
 			_easing_out = false
 			_easing = 0.0
+			if not _running:
+				$audio.stop()
+			$audio.volume_db = _volume_on
+			$audio.pitch_scale = _pitch_on
 		else:
+			if not $audio.playing:
+				$audio.play()
 			var adj
+			var vol
 			if _easing_in:
 				adj = 1.0 - (_easing / ease_in)
+				vol = adj
 			else:
-				adj = 1.0 - (_easing / ease_out)
+				vol = (_easing / ease_out)
+				adj = vol
+			$audio.volume_db = (-80 + ((_volume_on + 80) * vol))
+			$audio.pitch_scale = 0.1 + ((_pitch_on - 0.1) * vol)
 			rotate(deg2rad(degrees_per_second * adj * delta))
-	if _running:
+	elif _running:
+		if not $audio.playing:
+			$audio.play()
 		rotate(deg2rad(degrees_per_second * delta))
 

Data/Scripts/Glowdot.gd

 	material.set_shader_param("fade_offset", _camp(v, 0.1, 0.5))
 
 func _get_pulse_offset():
-	if self.get_name() == "Dot21":
-		print("PING")
 	return _ramp(material.get_shader_param("fade_offset"), 0.1, 0.5)
 
 func _set_pulse_color(c):

Data/Sound/Attributions.txt

+The following are the sound effects/music and the places in which they were obtained...
+
+Effects/click.wav
+https://freesound.org/people/OtisJames/sounds/215772/
+
+Effects/generator1.wav
+https://freesound.org/people/HerbertBoland/sounds/114594/
+
+Effects/saw.wav
+https://freesound.org/people/Marregheriti/sounds/266104/
+
+

Data/Sound/Effects/click.wav.import

+[remap]
+
+importer="wav"
+type="AudioStreamSample"
+path="res://.import/click.wav-15f0a8bac0191e01d61291a7ee455683.sample"
+
+[deps]
+
+source_file="res://Data/Sound/Effects/click.wav"
+dest_files=[ "res://.import/click.wav-15f0a8bac0191e01d61291a7ee455683.sample" ]
+
+[params]
+
+force/8_bit=false
+force/mono=false
+force/max_rate=false
+force/max_rate_hz=44100
+edit/trim=false
+edit/normalize=false
+edit/loop=false
+compress/mode=0

Data/Sound/Effects/generator1.wav.import

+[remap]
+
+importer="wav"
+type="AudioStreamSample"
+path="res://.import/generator1.wav-7c89107f0246adc6370d751013550dff.sample"
+
+[deps]
+
+source_file="res://Data/Sound/Effects/generator1.wav"
+dest_files=[ "res://.import/generator1.wav-7c89107f0246adc6370d751013550dff.sample" ]
+
+[params]
+
+force/8_bit=false
+force/mono=false
+force/max_rate=false
+force/max_rate_hz=44100
+edit/trim=false
+edit/normalize=false
+edit/loop=false
+compress/mode=0

Data/Sound/Effects/saw.wav.import

+[remap]
+
+importer="wav"
+type="AudioStreamSample"
+path="res://.import/saw.wav-4d391556f8ccb707f189b4b5bb477e2e.sample"
+
+[deps]
+
+source_file="res://Data/Sound/Effects/saw.wav"
+dest_files=[ "res://.import/saw.wav-4d391556f8ccb707f189b4b5bb477e2e.sample" ]
+
+[params]
+
+force/8_bit=false
+force/mono=false
+force/max_rate=false
+force/max_rate_hz=44100
+edit/trim=false
+edit/normalize=false
+edit/loop=true
+compress/mode=0

Data/Toggler.gd

+extends Node2D
+
+
+
+
+func _on_Area2D_body_entered(body):
+	var bs = get_parent().get_node("BladeSaw")
+	bs.active = !bs.active

default_bus_layout.tres

+[gd_resource type="AudioBusLayout" format=2]
+
+[resource]
+bus/1/name = "Effects"
+bus/1/solo = false
+bus/1/mute = false
+bus/1/bypass_fx = false
+bus/1/volume_db = 0.0
+bus/1/send = "Master"