Playing Flappy Astronaut Game on Raspberry Pi Sense HAT

SenseHATFlappyAstronaut.py

# References:
# https://projects.raspberrypi.org/en/projects/flappy-astronaut

from sense_hat import SenseHat
from random import randint
from time import sleep

sense = SenseHat()
RED = (255, 0, 0)
BLUE = (0, 0, 255)
YELLOW = (255, 255, 0)

DELAY_DECREASE = 0.02

def flatten(matrix):
    flattened = [pixel for row in matrix for pixel in row]
    return flattened

def gen_pipes(matrix):
    for row in matrix:
        row[-1] = RED
    gap = randint(1, 6)
    matrix[gap][-1] = BLUE
    matrix[gap - 1][-1] = BLUE
    matrix[gap + 1][-1] = BLUE
    return matrix

def move_pipes(matrix):
    for row in matrix:
        for i in range(7):
            row[i] = row[i + 1]
        row[-1] = BLUE
    return matrix

def draw_astronaut(event):
    global y
    global x
    global score
    global gameOver
    sense.set_pixel(x, y, BLUE)
    if event.action == "pressed":
        if event.direction == "up" and y > 0 and gameOver == False:
            y -= 1
        elif event.direction == "down" and y < 7 and gameOver == False:
            y += 1
        elif event.direction == "right" and x < 7 and gameOver == False:
            x += 1
        elif event.direction == "left" and x > 0 and gameOver == False:
            x -= 1
        elif event.direction == "middle" and score > 0:
            score = 0
    sense.set_pixel(x, y, YELLOW)

def check_collision(matrix):
    global gameOver
    if matrix[y][x] == RED:
        gameOver = True
        return True
    else:
        return False

x = 0
y = 0
score = 0
gameDelay = 1
gameOver = False

sense.stick.direction_any = draw_astronaut
while True:
    matrix = [[BLUE for column in range(8)] for row in range(8)]
    gameDelay = 1
    gameOver = False

    while True:
        matrix = gen_pipes(matrix)
        if check_collision(matrix):
            sleep(1)
            break
        
        for i in range(3):
            matrix = move_pipes(matrix)
            sense.set_pixels(flatten(matrix))
            sense.set_pixel(x, y, YELLOW)
            if check_collision(matrix):
                sleep(1)
                break
            if i == 2:
                score = score + 1
                gameDelay = gameDelay - DELAY_DECREASE
                if gameDelay < 0.2:
                    gameDelay = 0.2
            sleep(gameDelay)
    
    while score:
        sense.show_message("Score: {}".format(score-2), text_colour=YELLOW)
        # Press joystick middle button to play again