hey whats the code for moving left and right i cant find it

ok so focus on the top half please, im trying to load a level into my game but something is screwed up with my code

so ive made a short platforming level for my game can some tell me how to put it in the game.can someone tell me the code for doing so

i have 2 questions,1. i am making a side scrolling map when im finished it how do i put it in the game, and 2. how do i make my character move side to side and jump (it would be awesome if you could post a screenshot for this)

could someone tell me the code for pressing A to start the game please

ive made an introduction screen with its own background, but how do i switch to a menu screen with a different background

also whats the code for making a start menu?

can someone help me out? what is the code for making things randomly appear im thinking of making a five nights at freddys game