Caterpillar Game Project in Python

Posted by admin July 7, 2023
Caterpillar Game Project in Python

The Hungry Caterpillar Game project in Python is a single-player game for desktops. The project contains basic functions that demonstrate the actual gameplay. This application contains a variety of shapes and colored backgrounds. This game provides a basic example on how to program in Python programming.

Caterpillar Game Project Python

To Build a Simple  Caterpillar Game Project You need to follow the below steps

Step 1. Download Python

You only need Python to run this script. You can visit here to download Python and then you need to install a package named turtle

pip install turtle

Step 2. Write the following code

Write this code in a Python file or directly copy this code and save the file with the name and .py extension e.g python Caterpillar.py

import turtle as t
import random as rd

t.bgcolor('yellow')

caterpillar = t.Turtle()
caterpillar.shape('square')
caterpillar.speed(0)
caterpillar.penup()
caterpillar.hideturtle()

leaf = t.Turtle()
leaf_shape = ((0,0),(14,2),(18,6),(20,20),(6,18),(2,14))
t.register_shape('leaf', leaf_shape)
leaf.shape('leaf')
leaf.color('green')
leaf.penup()
leaf.hideturtle()
leaf.speed()

game_started = False
text_turtle = False
text_turtle = t.Turtle()
text_turtle.write('Press SPACE to start', align='center', font=('Arial', 18, 'bold'))
text_turtle.hideturtle()

score_turtle = t.Turtle()
score_turtle.hideturtle()
score_turtle.speed(0)

def outside_window():
    left_wall = -t.window_width()/2
    right_Wall = t.window_width()/2
    top_wall = t.window_height()/2
    bottom_wall = -t.window_height()/2
    (x,y) = caterpillar.pos()
    outside = x < left_wall or x > right_Wall or y > top_wall or y < bottom_wall
    return outside

def game_over():
    caterpillar.color('yellow')
    leaf.color('yellow')
    t.penup()
    t.hideturtle()
    t.write('GAME OVER !', align='center', font=('Arial', 30, 'normal') )
    t.onkey(start_game,'space')

def display_score(current_score):
    score_turtle.clear()
    score_turtle.penup()
    x = (t.window_width()/2) - 70
    y = (t.window_height()/2) - 70
    score_turtle.setpos(x,y)
    score_turtle.write(str(current_score), align='right', font=('Arial', 40, 'bold'))

def place_leaf():
    leaf.hideturtle()
    leaf.setx(rd.randint(-200,200))
    leaf.sety(rd.randint(-200,200))
    leaf.showturtle()

def start_game():
    global game_started
    if game_started:
        return
    game_started = True
    
    score = 0
    text_turtle.clear()

    caterpillar_speed = 2
    caterpillar_length = 3
    caterpillar.shapesize(1,caterpillar_length,1)
    caterpillar.showturtle()
    display_score(score)
    place_leaf()

    while True:
        caterpillar.forward(caterpillar_speed)
        if caterpillar.distance(leaf) < 20:
            place_leaf()
            caterpillar_length = caterpillar_length + 1
            caterpillar.shapesize(1,caterpillar_length,1)
            caterpillar_speed = caterpillar_speed + 1
            score = score + 10
            display_score(score)
        if outside_window():
            game_over()
            break

def move_up():
        caterpillar.setheading(90)

def move_down():
        caterpillar.setheading(270)

def move_left():
        caterpillar.setheading(180)

def move_right():
        caterpillar.setheading(0)
        
def restart_game():
 start_game()

t.onkey(start_game,'space')
t.onkey(restart_game,'Up')
t.onkey(move_up,'Up')
t.onkey(move_right,'Right')
t.onkey(move_down,'Down')
t.onkey(move_left,'Left')
t.listen()
t.mainloop()

Step 3. Run the code

After saving the code double-click on the file to run the program or simply open Command Prompt and write the following command.

python Caterpillar.py

Demo: