My first ever program!

bubbledestroyer_2.py

from tkinter import *
HEIGHT = 500
WIDTH = 800
window = Tk()
window.title('Bubble Destroyer')
''
c = Canvas(window, width=WIDTH, height=HEIGHT, bg='darkblue')
c.pack()
ship_id = c.create_polygon(5, 5, 5, 25, 30, 15, fill='green')
ship_id2 = c.create_oval(0, 0, 30, 30, outline='green')
SHIP_R = 15
MID_X = WIDTH / 2
MID_Y = HEIGHT / 2
c.move(ship_id, MID_X, MID_Y)
c.move(ship_id2, MID_X, MID_Y)
SHIP_SPD = 10

def move_ship(event):
	if event.keysym == 'Up':
		c.move(ship_id, 0, -SHIP_SPD)
		c.move(ship_id2, 0, -SHIP_SPD)
	elif event.keysym == 'Down':
		c.move(ship_id, 0, SHIP_SPD)
		c.move(ship_id2, 0, SHIP_SPD)
	elif event.keysym == 'Left':
		c.move(ship_id, -SHIP_SPD, 0)
		c.move(ship_id2, -SHIP_SPD, 0)
	elif event.keysym == 'Right':
		c.move(ship_id, SHIP_SPD, 0)
		c.move(ship_id2, SHIP_SPD, 0)
c.bind_all('<Key>', move_ship)

from random import randint
bub_id = list()
bub_r = list ()
bub_speed = list()
MIN_BUB_R = 10
MAX_BUB_R =30
MAX_BUB_SPD = 10
GAP = 100
def create_bubble():
	x = WIDTH + GAP
	y = randint(0, HEIGHT)
	r = randint (MIN_BUB_R, MAX_BUB_R)
	id1 = c.create_oval(x - r, y - r, x + r, y + r, outline='green')
	bub_id.append(id1)
	bub_r.append(r)
	bub_speed.append(randint(1, MAX_BUB_SPD))
	
#part 5 - checked ok
def move_bubbles():
	for i in range(len(bub_id)):
		c.move(bub_id[i], -bub_speed[i], 0)

#part 7 - checked ok		
def get_coords(id_num):
	pos = c.coords(id_num)
	x = (pos[0] + pos[2])/2
	y = (pos[1] + pos[3])/2
	return x, y 

#part 8 - ok  	
def del_bubble(i):
	del bub_r[i]
	del bub_speed[i]
	c.delete(bub_id[i])
	del bub_id[i]
	
#part 9 - ok 
def clean_up_bubs():
	for i in range(len(bub_id)-1, -1, -1):
		x, y = get_coords(bub_id[i])
		if x < -GAP:
			del_bubble(i)

#part 11 - ok			
from math import sqrt
def distance(id1, id2):
	x1, y1 = get_coords(id1)
	x2, y2 = get_coords(id2)
	return sqrt((x2 - x1)**2 + (y2 - y1)**2)

#part 12 - ok  	
def collision():
	points = 0
	for bub in range(len(bub_id)-1, -1, -1):
		if distance(ship_id2, bub_id[bub]) < (SHIP_R + bub_r[bub]):
			points += (bub_r[bub] + bub_speed[bub])
			del_bubble(bub)
	return points
	
#part 14 -
c.create_text(50, 30, text='TIME', fill='green' )
c.create_text(150, 30, text='score', fill='green')
time_text = c.create_text(50, 50, fill='green' )
score_text = c.create_text(150, 50, fill='green' )
def show_score(score):
	c.itemconfig(score_text, text=str(score))
def show_time(time_left):
	c.itemconfig(time_text, text=str(time_left))

from time import sleep, time
BUB_CHANCE = 10
TIME_LIMIT = 60
BONUS_SCORE = 1000
score = 0
bonus = 0
end = time() + TIME_LIMIT
#MAIN GAME LOOP
while time() < end:
	if randint(1, BUB_CHANCE) == 1:
		create_bubble()
	move_bubbles()
	clean_up_bubs()
	score += collision()
	if (int(score / BONUS_SCORE)) > bonus:
		bonus += 1
		end += TIME_LIMIT 
	show_score(score)
	show_time(int(end - time()))
	print(score)
	window.update()
	sleep(0.01)
	
c.create_text(MID_X, MID_Y, \
	text='GAME OVER!!!!!!!!!', fill='green', font=('Helvetica', 30))
c.create_text(MID_X, MID_Y + 30, \
	text='score: '+ str(score), fill='green')
c.create_text(MID_X, MID_Y + 45, \
	text='Bonus time: '+ str(bonus*TIME_LIMIT), fill='green')