add UI

src/UI/GUI.tscn

@@ -0,0 +1,41 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://UI/pause.png" type="Texture" id=1]
+[ext_resource path="res://UI/speed.png" type="Texture" id=2]
+[ext_resource path="res://UI/GUI.gd" type="Script" id=3]
+
+[node name="GUI" type="CanvasLayer"]
+pause_mode = 2
+script = ExtResource( 3 )
+
+[node name="HBoxContainer" type="HBoxContainer" parent="."]
+anchor_left = 1.0
+anchor_right = 1.0
+margin_left = -6.0
+margin_right = 49.0
+margin_bottom = 24.0
+rect_scale = Vector2( 0.1, 0.1 )
+alignment = 2
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="pause" type="Button" parent="HBoxContainer"]
+margin_left = 2.0
+margin_right = 24.0
+margin_bottom = 20.0
+size_flags_horizontal = 0
+size_flags_vertical = 0
+toggle_mode = true
+icon = ExtResource( 1 )
+
+[node name="speed" type="Button" parent="HBoxContainer"]
+margin_left = 28.0
+margin_right = 55.0
+margin_bottom = 20.0
+size_flags_horizontal = 0
+size_flags_vertical = 0
+toggle_mode = true
+icon = ExtResource( 2 )
+[connection signal="toggled" from="HBoxContainer/pause" to="." method="_on_pause_toggled"]
+[connection signal="toggled" from="HBoxContainer/speed" to="." method="_on_speed_toggled"]