diff --git a/entity/coin.tres b/entity/coin.tres
new file mode 100644
index 0000000..3105d8a
--- /dev/null
+++ b/entity/coin.tres
@@ -0,0 +1,5 @@
+[gd_resource type="PhysicsMaterial" format=3 uid="uid://c6kn1an85lccr"]
+
+[resource]
+rough = true
+bounce = 0.3
diff --git a/entity/coin_copper.tscn b/entity/coin_copper.tscn
index 6e6142f..ca2cb98 100644
--- a/entity/coin_copper.tscn
+++ b/entity/coin_copper.tscn
@@ -1,19 +1,19 @@
 [gd_scene load_steps=5 format=3 uid="uid://c3kitncwpi42j"]
 
+[ext_resource type="PhysicsMaterial" uid="uid://c6kn1an85lccr" path="res://entity/coin.tres" id="1_1merf"]
 [ext_resource type="Texture2D" uid="uid://dbdkb4vt7dh85" path="res://entity/coin_copper_4.png" id="1_wedw1"]
 [ext_resource type="Texture2D" uid="uid://2vtvoj6ua3cb" path="res://entity/coin_copper_outline_2.png" id="2_2ifq3"]
 
-[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_06g2i"]
-bounce = 0.1
-
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_c6byl"]
 size = Vector2(14, 3)
 
 [node name="CoinCopper" type="RigidBody2D"]
 collision_layer = 5
 collision_mask = 7
-physics_material_override = SubResource("PhysicsMaterial_06g2i")
+physics_material_override = ExtResource("1_1merf")
 continuous_cd = 1
+linear_damp = 0.1
+angular_damp = 0.1
 
 [node name="Outline" type="Sprite2D" parent="."]
 z_index = -10