Put platforms in a Python game with Pygame

This is part 6 in an ongoing series about creating video games in Python 3 using the Pygame module. Previous articles are

Getting Started With Python Games On Raspberry Pi (Pygame) – RaspberryTips

Put platforms in a Python game with Pygame

Can you write a game in Python without using Pygame or Pygame Zero? - Quora

How to Create a Platformer Game in Python - The Python Code

A Step-by-Step Guide to Creating a Python Game with Pygame, by Gunnar Martinez

Build a Platform Game in Python With Arcade – Real Python

Getting Started With Python Games On Raspberry Pi (Pygame) – RaspberryTips

Python Platformer Tutorial Animations, Sprites, Collisions, Jumping, Gravity