feat: parallax and more environment

camera/camera.tscn

@@ -9,6 +9,7 @@ size = Vector2(630, 340)
 script = ExtResource("1_f5lvx")
 
 [node name="Area2D" type="Area2D" parent="."]
+visible = false
 collision_layer = 0
 collision_mask = 2
 
@@ -16,6 +17,8 @@ collision_mask = 2
 shape = SubResource("RectangleShape2D_7mycd")
 
 [node name="Camera2D" type="Camera2D" parent="."]
+position_smoothing_enabled = true
+position_smoothing_speed = 30.0
 
 [connection signal="body_entered" from="Area2D" to="." method="_on_body_entered"]
 [connection signal="body_exited" from="Area2D" to="." method="_on_body_exited"]