Moving an object on the X axis corresponding to mouse movment

Hi all,

first question here, so sorry if its a stupid one, but I have searched the answers with no luck.

I was playing around in Unity, self teaching with youtube and forums, but one thing I couldn't figure out is how to get an object to move along the X axis with the mouse movements. ie: if i move the mouse to the left, the object will follow it to the left; if I move the mouse to the right, it will follow it to the right.

I have no working code, sorry. All I have is an isometric view on a never ending plane.

IDEA: I am trying to make a game where you slide the ball from left to right on on the x axis corresponding to mouse movement (left and right) while dodging cubes moving towards you.

If anyone could so me how to do this, it would be greatly appreciated. And if possible, a bit of detail on what bits do what and such.

Cheers and TIA.