To make sure that your game runs the same on all computers that can handle it. You will need to make sure that your actions are independent from the frame rate. To do this in python you can put this code above the game loop
framerate = 60 #frames per second
clock = pygame.time.Clock()
and then at the end of your game loop put
timepassed = clock.tick(framerate)
This should help with makeing the game more playable ^_^
Hope this helps.