Add screne interfaces

scenes/UI/About.tscn

@@ -0,0 +1,8 @@
+[gd_scene format=2]
+
+[node name="About" type="Control"]
+anchor_right = 1.0
+anchor_bottom = 1.0
+__meta__ = {
+"_edit_use_anchors_": false
+}

scenes/UI/ChooseScene.tscn

@@ -0,0 +1,8 @@
+[gd_scene format=2]
+
+[node name="ChooseScene" type="Control"]
+anchor_right = 1.0
+anchor_bottom = 1.0
+__meta__ = {
+"_edit_use_anchors_": false
+}