Pygame, как изменить размер шрифта ввода с клавиатуры?

Question

В настоящее время я использую тексты и тексты в Pygame, и пока моя программа работает нормально, и она сталкивается с краем экрана. Проблема в том, что я не знаю, как изменить размер шрифта после нажатия клавиши, чтобы она правильно сталкивалась со стеной. Все остальное работает нормально, только столкновение после изменения размера шрифта не работает должным образом. Кто-нибудь может мне помочь с этим?

import pygame # Import the pygame and sys module.
import sys

pygame.init() # Initialize pygame.

screen = pygame.display.set_mode((800,600),0) # Set the display and display caption.
pygame.display.set_caption("Pygame Text With Rects")

width = screen.get_width() # Declare the variables for the width height and text.
height = screen.get_height()
x = int(width / 2)
y = int(height / 2)
dx = 0
dy = 0
speed = 10
oldx = x
oldy = y

WHITE = (255,255,255) # Declare the variables for various colours and the colour of the text.
GREEN = (0,255,0)
RED = (255,0,0)
BLUE = (0,0,255)
BLACK = (0, 0, 0)
YELLOW = (255, 255, 0)

colour = BLACK

fontSize = 30


screen.fill(WHITE) # Fill the screen white and update the display.
pygame.display.update()

fontTitle = pygame.font.SysFont("comicsansms", fontSize) # Declare the fontTitle and textTitle variables that will render the text with the given font.
textTitle = fontTitle.render("Go Huskies", True, colour)
textRect = textTitle.get_rect(center=(x, y)) # Create a rectangle around the font rendered above.

main = True
while main:
    for event in pygame.event.get():
        if event.type ==pygame.QUIT: # Input handling for moving the text and changing the colour depending on the direction the text travels.
            main = False
        if event.type ==pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                dx = 0
                dy = -speed
                colour = RED
                fontTitle = pygame.font.SysFont("arial", fontSize) # Declare the fontTitle and textTitle variables that will render the text with the given font.
            elif event.key == pygame.K_DOWN:
                dx = 0
                dy = speed
                colour = BLUE
                fontTitle = pygame.font.SysFont("comicsansms", fontSize) # Declare the fontTitle and textTitle variables that will render the text with the given font.
            elif event.key == pygame.K_LEFT:     
                dx = -speed                     
                dy = 0
                colour = GREEN
                fontTitle = pygame.font.SysFont("sourceserifpro", fontSize) # Declare the fontTitle and textTitle variables that will render the text with the given font.
            elif event.key == pygame.K_RIGHT:
                dx = speed
                dy = 0
                colour = YELLOW
                fontTitle = pygame.font.SysFont("mvboli", fontSize) # Declare the fontTitle and textTitle variables that will render the text with the given font.
            elif event.key == pygame.K_c: # If the c key is pressed move the text rectangle and therefore text to the centre of the screen.
                textRect.x = screen.get_width() / 2
                textRect.y = screen.get_height() / 2
                colour = BLACK
                fontTitle = pygame.font.SysFont("arial", fontSize) # Declare the fontTitle and textTitle variables that will render the text with the given font.
                textRect = textTitle.get_rect(center=(x, y)) # Create a rectangle around the font rendered above.

        if event.type == pygame.KEYUP:
            if event.key == pygame.K_UP or event.key == pygame.K_DOWN:
                dx = 0
                dy = 0
            elif event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                dx = 0
                dy = 0

    screen.fill(WHITE)

    textTitle = fontTitle.render("Go Huskies", True, colour) # Render the text again with the new colour that would have changed after a key press.

    oldx = textRect.x # Set the oldx and oldy variables to the x and y position of the text rectangle.
    oldy = textRect.y
    textRect.move_ip(dx, dy) # Move the rectangle.

    if (textRect.top <= 0) or (textRect.bottom >= height): # Collision for the rectangle using the .top, .bottom, .left and .right.
        dy = 0 
        textRect.y = int(oldy)
    if (textRect.left <= 0) or (textRect.right >= width):
        dx = 0
        textRect.x = int(oldx)

    screen.blit(textTitle, textRect) # Blit the text to the screen and update the display.
    pygame.display.update()

pygame.quit() # Quit pygame.
sys.exit()