diff --git a/freegames/overlap.py b/freegames/overlap.py
new file mode 100644
index 00000000..65b814a5
--- /dev/null
+++ b/freegames/overlap.py
@@ -0,0 +1,126 @@
+"""Overlap, classic arcade game.
+
+Exercises
+
+1. Change the shape.
+2. Change the color.
+3. Change the speed of rectangle.
+4. Change the a diminishing amount.
+5. Change the the direction of the path(ex.horizontal orientation).
+6. Change thr speed of frame.
+"""
+
+from turtle import *
+from freegames import vector
+
+rectangle = vector(0, 0)
+move = vector(0, 3)
+overlap = {0: vector(0, 0)}
+defualt_size = 270
+goal_size = 0
+
+
+def empty_rectangle(x, y, size):
+    """Draw empty rectangle at (x, y) with given width and height."""
+    up()
+    goto(x, y)
+    down()
+    draw_rectangle(size)
+
+
+def filled_ractangle(x, y, size):
+    """Draw filled rectangle at (x, y) with given width and height."""
+    up()
+    goto(x, y)
+    begin_fill()
+    draw_rectangle(size)
+    end_fill()
+
+
+def draw_rectangle(size):
+    """Draw rectangle line with given size."""
+    for count in range(2):
+        forward(size)
+        left(90)
+        forward(size)
+        left(90)
+
+
+def stamp(x, y, text, _color='black', font_size=10):
+    """Display `text` at coordinates `x` and `y`."""
+    goto(x, y)
+    color(_color)
+    write(text, font=('Arial', font_size, 'normal'))
+
+
+def i_size(step):
+    """Return the rectangle size of the step"""
+    return defualt_size - (step) * 30
+
+
+def end():
+    """End the game by stopping moving rectangle"""
+    move.y = 0
+    del overlap[len(overlap) - 1]
+
+
+def draw():
+    """Draw rectangle frames and a moving rectangle."""
+    clear()
+
+    if i_size(len(overlap)) == goal_size:
+        stamp(-200, 100, 'Win!', _color='red', font_size=30)
+        done()
+
+    stamp(-200, -200, 'Score : ' + str(len(overlap) - 1))
+
+    size = i_size(len(overlap))
+
+    for i in range(0, len(overlap)):
+        size_i = i_size(i)
+        empty_rectangle(overlap[i].x - size_i / 2, overlap[i].y - size_i / 2, size_i)
+
+    rectangle.move(move)
+    x = rectangle.x
+    y = rectangle.y
+
+    filled_ractangle(x - (size / 2), y - (size / 2), size)
+
+    if y + move.y - size * 0.5 <= -210 or y + move.y + size * 0.5 >= 210:
+        move.y = -move.y
+
+    ontimer(draw, 5)
+
+
+def tap(x, y):
+    """Respond to screen click at a moving rectangle."""
+    overlap[len(overlap)] = vector(rectangle.x, rectangle.y)
+
+    curr_size = i_size(len(overlap) - 1)
+    prev_size = i_size(len(overlap) - 2)
+
+    curr_square = overlap[len(overlap) - 1]
+    prev_square = overlap[len(overlap) - 2]
+
+    if curr_square.x - curr_size / 2 < prev_square.x - prev_size / 2:
+        end()
+        done()
+    elif curr_square.y - curr_size / 2 < prev_square.y - prev_size / 2:
+        end()
+        done()
+    elif curr_square.x + curr_size / 2 > prev_square.x + prev_size / 2:
+        end()
+        done()
+    elif curr_square.y + curr_size / 2 > prev_square.y + prev_size / 2:
+        end()
+        done()
+    elif i_size(len(overlap)) == goal_size:
+        move.y = 0
+
+
+setup(width=420, height=420)
+hideturtle()
+tracer(False)
+onscreenclick(tap)
+draw()
+done()
diff --git a/freegames/turtlerace.py b/freegames/turtlerace.py
new file mode 100644
index 00000000..64e962fa
--- /dev/null
+++ b/freegames/turtlerace.py
@@ -0,0 +1,76 @@
+"""TurtleRace, classic race game.
+
+Exercises
+
+1. Change the speed of obstacle.
+2. Change the generation frequency of obstacle.
+3. Change the color of obstacle.
+3. Upgrade 3-line race to 5-line race.
+"""
+
+from freegames import line
+from freegames import vector
+from turtle import *
+from random import choice, random
+
+turtle = vector(-5, -160)
+obstacle_speed = -2
+ob_timer = 0
+obstacle = []
+
+
+def raceline():
+    """Draw two race lines."""
+    line(-20, 200, -20, -200)
+    line(10, 200, 10, -200)
+
+
+def move(change):
+    """Move player position by change."""
+    if -30 <= turtle.x + change <= 20:
+        turtle.move(vector(change, 0))
+
+
+def draw():
+    """Draw game, move obstacles and player."""
+    clear()
+
+    raceline()
+
+    if ob_timer > 40 and random() > 0.8:
+        obstacle.append(vector(-25 * choice([-1, 0, 1]) - 5, 200))
+        ob_timer = 0
+    else:
+        ob_timer += 1
+
+    for i in range(len(obstacle)):
+        up()
+        goto(obstacle[i].x, obstacle[i].y)
+        dot(10, 'red')
+
+    for i in range(len(obstacle)):
+        obstacle[i].move(vector(0, obstacle_speed))
+
+    x = turtle.x
+    y = turtle.y
+
+    up()
+    goto(x, y)
+    dot(10)
+
+    for i in range(len(obstacle)):
+        if obstacle[i].__eq__(vector(x, y)):
+            done()
+
+    ontimer(draw, 5)
+
+
+setup(width=100, height=400)
+hideturtle()
+tracer(False)
+listen()
+onkey(lambda: move(25), 'd')
+onkey(lambda: move(-25), 'a')
+draw()
+
+done()