add crosshair

scenes/ui.tscn

@@ -18,3 +18,18 @@ offset_left = -40.0
 offset_bottom = 23.0
 grow_horizontal = 0
 text = "Speed:"
+
+[node name="Panel" type="Panel" parent="."]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -4.0
+offset_top = -4.0
+offset_right = 4.0
+offset_bottom = 4.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 1