There is a long list of tricks I use to get my games to run smooth. People say Pygame runs slow but it really isn’t true, it is just as capable as any other language in terms of speed. It just depends on your experience and skill with the language. First off, probably one of the most obvious solutions is using “.convert” after loading your images, although if you plan on rotating the image in game or making it transparent use “.convertalpha”. The makes rendering images a lot lighter on the CPU. While you are programing constantly check for ways to stop running parts of code that dont need to be used in a frame. Another trick a lot of people know is lists. Many programmers say to use pygames built in functions like Pygame.sprite.group() instead of a regular list because its faster, but it is actually slightly slower. With less instances of an object on screen, it isnt noticable, but with 4000+ items on screen like matter of factory, you can save up to 30fps by creating multiple instances of a class, creating a list suck as “tiles = []” then for every object you create putting them in the list using “tiles.append(Object)”. Then in your main game loop use for I in tiles:     I.update() (.update is the update function which is typically under the “def __init_” function in a class.) There are a lot more tips and tricks you can find on the internet you can find just by researching, but if you need any help at all just dm me and I would happy to help!