Fixed Character Movement

Hi I’m trying to make a small app game and my character moves to a fix location. Left, Middle,Right. but my problem is when I move left twice or right twice I move off screen from my fix camera.How can I stop my character from moving off screen,

look for an object called a blocking volume. it’s an invisible wall you can’t walk through. I think that might help!

I added a blocking volume but it goes right through it