Develop a typing game to improve keyboard skill as demonstrated in the following YouTube video.

At any moment ten random letters fall from the top of screen. When you hit a correct letter from keyboard, that letter disappears and is replaced by a new random letter dropping from the top. Also, your score will increase by 1. When you hit an incorrect letter, your score will decrease by 1.

Make these letters fall at random speeds and also let the speed increase gradually as time progresses. The game will end when a letter falls to the bottom of the screen.

You will need to use Turtle’s ontimer() and onkey() events to implement this project.

Source Code:

import turtle
import random

screen = turtle.Screen()
screen.setup(1000,1000)
screen.title('Typing Game - PythonTurtle.Academy')
screen.bgcolor('blue')
screen.tracer(0,0)
turtle.hideturtle()
turtle.up()
turtle.color('red')
score_turtle = turtle.Turtle()
score_turtle.color('red')
score_turtle.up()
score_turtle.hideturtle()
turtle.goto(350,400)
turtle.write('Score: ', align='center', font=('Courier',25,'normal'))

min_speed = 5
max_speed = 30
letters = []
speeds = []
pos = []
lts = []
n = 10
game_over = False
score = 0

def increase_difficulty():
    global min_speed, max_speed
    min_speed += 1
    max_speed += 1
    screen.ontimer(increase_difficulty,5000)

def draw_game_over():
    turtle.goto(0,0)
    turtle.color('red')
    turtle.write('GAME OVER', align='center', font=('Courier',50,'normal'))
    turtle.goto(0,-150)
    turtle.color('orange')
    turtle.write('Your Score is {}'.format(score), align='center', font=('Courier',40,'normal'))
    screen.update()

def draw_score():
    score_turtle.clear()
    score_turtle.goto(420,400)
    score_turtle.write('{}'.format(score),align='center',font=('Courier',25,'normal'))
    screen.update()
    
def draw_letters():
    global game_over
    for i in range(len(letters)):
        lts[i].clear()
        lts[i].goto(pos[i])
        lts[i].write(letters[i],align='center',font=('courier',20,'normal'))
        pos[i][1] -= speeds[i]
        if pos[i][1]<-500:
            game_over = True
            draw_game_over()
            return
    screen.update()
    screen.ontimer(draw_letters,50)

def f(c): # handle keyboard press
    global score
    if c in letters:
        score += 1
        k = letters.index(c)
        while True:
            l = chr(ord('a')+random.randrange(26))
            if l not in letters:
                letters[k] = l
                break            
        pos[k] = [random.randint(-450,450),500]        
        speeds[k] = random.randint(min_speed,max_speed)
    else: score -= 1
    draw_score()
        
for _ in range(n):
    lts.append(turtle.Turtle())
    while True:
        l = chr(ord('a')+random.randrange(26))
        if l not in letters:
            letters.append(l)
            break
    speeds.append(random.randint(min_speed,max_speed))
    pos.append([random.randint(-450,450),500])
    
for i in range(n):
    lts[i].speed(0)
    lts[i].hideturtle()
    lts[i].up()
    lts[i].color('yellow')
    
draw_letters()
increase_difficulty()

screen.onkey(lambda: f('a'), 'a')
screen.onkey(lambda: f('b'), 'b')
screen.onkey(lambda: f('c'), 'c')
screen.onkey(lambda: f('d'), 'd')
screen.onkey(lambda: f('e'), 'e')
screen.onkey(lambda: f('f'), 'f')
screen.onkey(lambda: f('g'), 'g')
screen.onkey(lambda: f('h'), 'h')
screen.onkey(lambda: f('i'), 'i')
screen.onkey(lambda: f('j'), 'j')
screen.onkey(lambda: f('k'), 'k')
screen.onkey(lambda: f('l'), 'l')
screen.onkey(lambda: f('m'), 'm')
screen.onkey(lambda: f('n'), 'n')
screen.onkey(lambda: f('o'), 'o')
screen.onkey(lambda: f('p'), 'p')
screen.onkey(lambda: f('q'), 'q')
screen.onkey(lambda: f('r'), 'r')
screen.onkey(lambda: f('s'), 's')
screen.onkey(lambda: f('t'), 't')
screen.onkey(lambda: f('u'), 'u')
screen.onkey(lambda: f('v'), 'v')
screen.onkey(lambda: f('w'), 'w')
screen.onkey(lambda: f('x'), 'x')
screen.onkey(lambda: f('y'), 'y')
screen.onkey(lambda: f('z'), 'z')

screen.listen()
screen.mainloop()