add stones, pickups

scenes/Pickup.tscn

@@ -0,0 +1,19 @@
+[gd_scene format=3 uid="uid://c8pickup3mn5x"]
+
+[ext_resource type="Script" path="res://scripts/Pickup.gd" id="1_pickup"]
+
+[sub_resource type="SphereMesh" id="SphereMesh_1"]
+radius = 0.18
+height = 0.36
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_1"]
+albedo_color = Color(1, 1, 1, 1)
+roughness = 0.4
+metallic = 0.2
+
+[node name="Pickup" type="Node3D"]
+script = ExtResource("1_pickup")
+
+[node name="PickupMesh" type="MeshInstance3D" parent="."]
+mesh = SubResource("SphereMesh_1")
+material_override = SubResource("StandardMaterial3D_1")