Review this code: import pygame
import math


pygame.init()


WINDOWWIDTH = 640
WINDOWHEIGHT = 480
DISPLAYSURFACE = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))


GRAVITY = 9.8 # Acceleration due to gravity in m/s^2
AIRDENSITY = 1.2 # Density of air in kg/m^3
MISSILEMASS = 1000 # Mass of the missile in kg
MISSILELENGTH = 5 # Length of the missile in m
MISSILEWIND_SPEED = 10 # Wind speed in m/s


def missiletrajectory(time, tmax, x0, y0, v0, g, t):
    tsincelaunch = t - 0
    x = x0 + v0 * tsincelaunch
    y = y0 + (GRAVITY * tsincelaunch) / (2 * MISSILEMASS)
    return (x, y)


def computeimpactspot(time, tmax, x0, y0, v0, g, t):
    while True:
# Compute the position of the missile at the given time
        x, y = missiletrajectory(time, tmax, x0, y0, v_0, g, t)

    # Check if the missile has landed
        if (y > 0) or (y < 0):
            break

    # Compute the new position of the missile
        time += 1

        return (x, y)

x0 = 0
y0 =0
v_0 = MISSILEWIND_SPEED

# Set up the window surface
surface_color = (0, 0, 0)
surface_font_color = (255, 255, 255)

# Main game loop
while True:
    # Handle events
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                # Launch the missile
                t_0 = 0
                t_max = 50
                launch_missile(computeimpactspot(0, t_max, x0, y0, v_0, g, 0), computeimpactspot)
            if event.key == pygame.K_ESCAPE:
                # Pause the game
                pygame.display.flip()
                pygame.time.wait(1000)
                computeimpactspot(0, t_max, x0, y0, v_0, g, 0)

    # Clear the window surface
    DISPLAYSURFACE.fill(surface_color)

    # Draw the missile trajectory
    missiletrajectory(0, 20, x0, y0, v_0, GRAVITY, 0)

    # Draw the impact spot
    pygame.draw.circle(DISPLAYSURFACE, surface_font_color, (computeimpactspot[0], computeimpactspot[1]), 2)

    # Update the window surface
    pygame.display.flip()

# Clean up
pygame.quit()