Unity3D Player角色移动控制脚本

void FixedUpdate () {
        float moveHorizontal = Input.GetAxis ("Horizontal");
        float moveVertical = Input.GetAxis ("Vertical");

        Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);

        rigidbody.AddForce (movement * speed);
    }

参考：

Unity3D Player角色移动控制脚本