How to make a bullet fly straight?

Question

Unity

There is a player with a weapon and a top view. I want to make it so that when LMB is pressed in the player's place, a cube is created and flies in the direction where the player was looking. I practically implemented it, but when I spin the character, the cube's flight path also changes. Help. Screenshots of the code and screenshots from the video attached.

Answer 1

In FixedUpdate, uberic way.forward assignment (assuming the character's direction)
Assign it once in Start().