bones a bit better

objects/enemy/bone_particle.tscn

@@ -10,6 +10,7 @@ a = Vector2( 0, -2 )
 b = Vector2( 0, 2 )
 
 [node name="BoneParticle" type="RigidBody2D"]
+collision_layer = 16
 physics_material_override = SubResource( 2 )
 
 [node name="Sprite" type="Sprite" parent="."]

objects/enemy/skelarcher.gd

@@ -37,7 +37,8 @@ func die():
 		var bone = BoneParticle.instance()
 		bone.rotation = rand_range(0.0, 2.0*PI) # random rotation
 		bone.global_position = global_position
-		bone.linear_velocity = Vector2(bones_speed, 0.0).rotated(rand_range(-PI, 0.0))
+		bone.linear_velocity = Vector2(bones_speed * rand_range(0.5, 1.5), 0.0).rotated(rand_range(-PI, 0.0))
+		bone.angular_velocity = rand_range(-PI*2.0, PI*2.0)
 		var timer = get_tree().create_timer(3.0 + rand_range(0.0, 1.0), false)
 		timer.connect("timeout", bone, "queue_free")
 		get_parent().add_child(bone)

project.godot

@@ -144,6 +144,7 @@ pause={
 2d_physics/layer_2="player"
 2d_physics/layer_3="dynamic objects"
 2d_physics/layer_4="vision"
+2d_physics/layer_5="particles"
 
 [physics]