Pygame ile yapılan Mayın tarlası oyununda boş karolara kare yerleştirme

import pygame, sys, random

colors = [(172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101),
           (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94),
           (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101),
           (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94),
           (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101),
           (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94),
           (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101),
           (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94), (179, 214, 101), (172, 208, 94)]

coordinates = [(0,0), (75,0), (150,0), (225,0), (300,0), (375,0), (450,0), (525,0),
               (0,75), (75,75), (150,75), (225,75), (300,75), (375,75), (450,75), (525,75),
               (0,150), (75,150), (150,150), (225,150), (300,150), (375,150), (450,150), (525,150),
               (0,225), (75,225), (150,225), (225,225), (300,225), (375,225), (450,225), (525,225),
               (0,300), (75,300), (150,300), (225,300), (300,300), (375,300), (450,300), (525,300),
               (0,375), (75,375), (150,375), (225,375), (300,375), (375,375), (450,375), (525,375),
               (0,450), (75,450), (150,450), (225,450), (300,450), (375,450), (450,450), (525,450),
               (0,525), (75,525), (150,525), (225,525), (300,525), (375,525), (450,525), (525,525)]

def destroyMine():
    global i
    mousepos = pygame.mouse.get_pos()
    mousex = mousepos[0] // 75
    mousey = mousepos[1] // 75

    tile_index = mousey * 8 + mousex

    if len(pressed) == 0:
        placeMines(10, coordinates[tile_index])
        pressed.append(coordinates[tile_index])
        surf.fill((223, 195, 163))
        screen.blit(surf, coordinates[tile_index])
    else:
        if coordinates[tile_index] in mines:
            pygame.quit()
            sys.exit()
        elif coordinates[tile_index] not in pressed:
            surf.fill((223, 195, 163))
            screen.blit(surf, coordinates[tile_index])
            pressed.append(coordinates[tile_index])
            i = 1
            checkEmptyTiles(coordinates[tile_index])

def checkEmptyTiles(coord):
    #Edges
    if (coord[0] + (i*75), coord[1]) not in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] + (i*75), coord[1]))
        pressed.append((coord[0] + (i*75), coord[1]))

    if (coord[0] - (i*75), coord[1]) not in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] - (i*75), coord[1]))
        pressed.append((coord[0] - (i*75), coord[1]))

    if (coord[0], coord[1] + (i*75)) not in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0], coord[1] + (i*75)))
        pressed.append((coord[0], coord[1] + (i*75)))

    if (coord[0], coord[1] - (i*75)) not in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0], coord[1] - (i*75)))
        pressed.append((coord[0], coord[1] - (i*75)))

    #Corners
    if (coord[0] + (i*75), coord[1] + (i*75)) in mines:
        pass

    if (coord[0] + (i*75), coord[1] - (i*75)) in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] + (i*75), coord[1] - (i*75)))
        pressed.append((coord[0] + (i*75), coord[1] - (i*75)))

    if (coord[0] - (i*75), coord[1] + (i*75)) in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] - (i*75), coord[1] + (i*75)))
        pressed.append((coord[0] - (i*75), coord[1] + (i*75)))

    if (coord[0] - (i*75), coord[1] - (i*75)) in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] - (i*75), coord[1] - (i*75)))
        pressed.append((coord[0] - (i*75), coord[1] - (i*75)))

def drawTiles(i):
    global rect, surf
    surf = pygame.surface.Surface((75,75))
    surf.fill(colors[i])
    rect = surf.get_rect(topleft = coordinates[i])
    screen.blit(surf,rect)

def placeMines(mineNum, pressedTile):
    global mines
    mines = []
    i = 0
    while i != mineNum:
        randcord = random.randrange(0,63)
        if coordinates[randcord] != pressedTile:
            if coordinates[randcord] not in mines:
                mines.append(coordinates[randcord])
                surf.fill((214, 109, 111))
                screen.blit(surf, coordinates[randcord])
            else:
                randcord = random.randrange(0,63)
        else:
            randcord = random.randrange(0,63)

        i += 1
    print(mines)

pygame.init()

screen = pygame.display.set_mode((600,600))
pygame.display.set_caption("Minesweeper")
clock = pygame.time.Clock()
gameState = "play"
i1 = 0

#Assets
bgsurf = pygame.image.load("assets/minesweeperbg.png")
bgrect = bgsurf.get_rect()
pressed = []

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

        if event.type == pygame.MOUSEBUTTONDOWN:
            if pygame.mouse.get_pressed()[0]:
                destroyMine()
            elif pygame.mouse.get_pressed()[2]:
                pass

    #Draw Board
    while i1 != 64:
        drawTiles(i1)
        i1 += 1

    #Blits
    if gameState == "play":
        #screen.blit(bgsurf, bgrect)
        pass

    #Update
    pygame.display.update()
    clock.tick(60)

def checkEmptyTiles(coord):
    #Edges
    if (coord[0] + (i*75), coord[1]) not in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] + (i*75), coord[1]))
        pressed.append((coord[0] + (i*75), coord[1]))

    if (coord[0] - (i*75), coord[1]) not in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] - (i*75), coord[1]))
        pressed.append((coord[0] - (i*75), coord[1]))

    if (coord[0], coord[1] + (i*75)) not in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0], coord[1] + (i*75)))
        pressed.append((coord[0], coord[1] + (i*75)))

    if (coord[0], coord[1] - (i*75)) not in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0], coord[1] - (i*75)))
        pressed.append((coord[0], coord[1] - (i*75)))

    #Corners
    if (coord[0] + (i*75), coord[1] + (i*75)) in mines:
        pass

    if (coord[0] + (i*75), coord[1] - (i*75)) in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] + (i*75), coord[1] - (i*75)))
        pressed.append((coord[0] + (i*75), coord[1] - (i*75)))

    if (coord[0] - (i*75), coord[1] + (i*75)) in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] - (i*75), coord[1] + (i*75)))
        pressed.append((coord[0] - (i*75), coord[1] + (i*75)))

    if (coord[0] - (i*75), coord[1] - (i*75)) in mines:
        surf.fill((223, 195, 163))
        screen.blit(surf, (coord[0] - (i*75), coord[1] - (i*75)))
        pressed.append((coord[0] - (i*75), coord[1] - (i*75)))