Basic collision masking based on dominant color assigned to the player's rim/particles.

Data/Scenes/World.tscn

@@ -62,18 +62,18 @@ shape = SubResource( 1 )
 self_modulate = Color( 0, 0, 0, 1 )
 texture = ExtResource( 1 )
 
-[node name="StaticBody2D5" type="StaticBody2D" parent="Ground"]
+[node name="Blue Barrier" type="StaticBody2D" parent="Ground"]
 position = Vector2( 258.724, 168.376 )
 rotation = -0.303533
 scale = Vector2( 2.16, 0.400001 )
-collision_layer = 2
-collision_mask = 5
+collision_layer = 4096
+collision_mask = 0
 
-[node name="CollisionShape2D" type="CollisionShape2D" parent="Ground/StaticBody2D5"]
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Ground/Blue Barrier"]
 shape = SubResource( 1 )
 
-[node name="Sprite" type="Sprite" parent="Ground/StaticBody2D5"]
-self_modulate = Color( 0, 0, 0, 1 )
+[node name="Sprite" type="Sprite" parent="Ground/Blue Barrier"]
+self_modulate = Color( 0, 0.180392, 1, 1 )
 texture = ExtResource( 1 )
 
 [node name="Liquid" parent="." instance=ExtResource( 3 )]

Data/Scripts/Controller.gd

@@ -41,10 +41,17 @@ var last_speed = 0
 
 
 func set_colors(prime, alt):
-	if alt.r != alt.g or alt.r != alt.b:
-		# only change the rim if there's a single dominant color.
-		$Sprite.material.set_shader_param("rim_color", alt);
-		$Particles.process_material.color = alt
+	$Sprite.material.set_shader_param("rim_color", alt);
+	$Particles.process_material.color = alt
+	if alt.r > alt.g and alt.r > alt.b:
+		_set_color_collision_mask(1)
+	elif alt.g > alt.r and alt.g > alt.b:
+		_set_color_collision_mask(2)
+	elif alt.b > alt.r and alt.b > alt.g:
+		_set_color_collision_mask(3)
+	else:
+		# This should reset all of the collision masks to ON!
+		_set_color_collision_mask(0)
 	
 	if prime.r != prime.g or prime.r != prime.b: # Only adjust mood if not all values are the same.
 		# Even if not all the same, there must be a single dominant color for mood to be adjusted.
@@ -112,6 +119,15 @@ func get_discomfort_adjustment(v):
 func get_body_radius():
 	return $CollisionShape2D.shape.radius
 
+
+func _set_color_collision_mask(id):
+	set_collision_mask_bit(10, true)
+	set_collision_mask_bit(11, true)
+	set_collision_mask_bit(12, true)
+	if id >= 1 and id <= 3:
+		set_collision_mask_bit(9 + id, false)
+
+
 func _set_base_tangential_accel(v):
 	base_tangential_accel = max(1.0, v)