csharpusing UnityEngine;

public class PlayerController : MonoBehaviour
{
    public float forwardSpeed = 10f;
    public float laneDistance = 4f; 
    public float sideSpeed = 10f;
    private int currentLane = 1; // 0=L, 1=M, 2=R

    void Update()
    {
        transform.Translate(Vector3.forward * forwardSpeed * Time.deltaTime);
        if (Input.GetKeyDown(KeyCode.A)) if (currentLane > 0) currentLane--;
        if (Input.GetKeyDown(KeyCode.D)) if (currentLane < 2) currentLane++;
        Vector3 target = new Vector3((currentLane - 1) * laneDistance, transform.position.y, transform.position.z);
        transform.position = Vector3.Lerp(transform.position, target, sideSpeed * Time.deltaTime);
    }