Setup UI canvas, added shield and game start.

score_counter.gd

@@ -0,0 +1,20 @@
+extends HBoxContainer
+
+var digit_coords = {
+    1: Vector2(0, 0),
+    2: Vector2(8, 0),
+    3: Vector2(16, 0),
+    4: Vector2(24, 0),
+    5: Vector2(32, 0),
+    6: Vector2(0, 8),
+    7: Vector2(8, 8),
+    8: Vector2(16, 8),
+    9: Vector2(24, 8),
+    0: Vector2(32, 8)
+}
+
+func display_digits(n):
+    var s = "%08d" % n
+    for i in 8:
+        get_child(i).texture.region = Rect2(digit_coords[int(s[i])],
+                Vector2(8, 8))