When I upgraded to version 6000 in Unity, I cannot move horizontally, as shown in the 5th section of this course, horizontal movement, even though I do the same things. Is it the same code but the input system is not the same?
Hi AldenizDeVR,
Welcome to our community! 
In which course and lecture are you? Did you try to share a link to the course? The link seems to point to lecture “Horizontal Player Movement” (currently #80) in our Unity 2D course.
Could you share a screenshot of what you did and have in the Unity Editor? And maybe also your code as formatted text?
See also:
- Forum User Guides : How to apply code formatting within your post
- Forum User Guides : How to mark a topic as solved