Learning Python: Scrolling platform game

How to create a platform-style game with a large scene that moves with game play.

[GjIndian-jruf]

When i draw the rect in the main game loop the fps drops by a huge amount, but if i pre render my game map on a surface and then blit that surf in the main game loop, the fps doesn't drop but in this way i am not able to add camera movements

[Ravikiran]

Can you please add code in github or so, Thanks