Space Invaders!
Here’s the space invaders type game, like I promised 
Ryan
from livewires import *
SCREEN_WIDTH = 640
SCREEN_HEIGHT = 480
def drawplayer(x,y):
"""This function draws the player at the position x y, modify this to
change how the player looks."""
return circle(x,y,r=10,filled=1)
def drawenemy(x,y):
"""This function draws enemies at the position x y, modify this to change
you the enemies look."""
return box(x-5,y-5,x+5,y+5,colour=Colour.red,filled=1)
enemy_x = 40
enemy_y = 400
begin_graphics(width=SCREEN_WIDTH,height=SCREEN_HEIGHT,title="Game")
allow_moveables()
# This is all the stuff that happens before we begin the game.
player = drawplayer(40, 40)
enemy = drawenemy(enemy_x, enemy_y)
direction = 'right'
# Begin the game.
while True:
keys = keys_pressed()
if 'x1b' in keys:
break
if '4' in keys:
move_by(player, -10, 0)
elif '6' in keys:
move_by(player, 10, 0)
if enemy_x < SCREEN_WIDTH-10 and direction == 'right':
move_by(enemy, 5, 0)
enemy_x += 5
elif enemy_x > 10 and direction == 'left':
move_by(enemy, -5, 0)
enemy_x -= 5
else:
if direction == 'right':
direction = 'left'
else:
direction = 'right'
sleep(0.1)
end_graphics()