problems with sprite animation

Hey guys, I have been following a tutorial from mybringback on youtube, its a tutorial for a 2d side scrolling game.
I'm having a lot of trouble animating my spritesheet for my character.
all the code is correct, as it is the same as the tutorial but when I play the game, my character flicks through all its frames when it should be standing still.
I cant even map the movement buttons, i've specified that "a" should move her left etc but as I said, the animation just plays throught the loop.

Does anyone know any common answers to this problem that I could try?
I'm also thinking about trying othello 2d but there is a lack of tutorials for it.
Should I keep trying, or make a jump to othello and start over?

Thanks guys.