Made the Snake Game!

Added Snake Game demo.

Day 21/scoreboard.py

@@ -0,0 +1,28 @@
+from turtle import Turtle
+
+ALIGNMENT = "center"
+FONT = ("Open Sans", 16, "normal")
+
+
+class Scoreboard(Turtle):
+    def __init__(self):
+        super().__init__()
+        self.score = 0
+        self.penup()
+        self.hideturtle()
+        self.goto(x=0, y=260)
+        self.color("white")
+        self.update_scoreboard()
+
+    def update_scoreboard(self):
+        self.write(f"Score: {self.score}", align=ALIGNMENT, font=FONT)
+
+    def increase_score(self):
+        self.score += 1
+        self.clear()
+        self.update_scoreboard()
+
+    def game_over(self):
+        self.goto(x=0, y=0)
+        self.color("red")
+        self.write("GAME OVER", align=ALIGNMENT, font=FONT)