Left–Right Movement (Unity C#)

Got you — here’s a clean 2D‑friendly left/right movement script that behaves exactly how you expect in a 2D Unity project. No 3D vectors, no physics weirdness, just pure 2D motion.

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🎮 2D Left–Right Movement (Unity C#)

using UnityEngine;

public class LeftRightMover2D : MonoBehaviour
{
    [Header("Movement Settings")]
    public float speed = 3f;          // Movement speed
    public float moveDistance = 2f;   // How far from the start point

    private Vector2 startPos;
    private int direction = 1;

    void Start()
    {
        startPos = transform.position;
    }

    void Update()
    {
        // Move horizontally in 2D
        transform.Translate(Vector2.right * direction * speed * Time.deltaTime);

        // Flip direction when reaching bounds
        if (Vector2.Distance(startPos, transform.position) >= moveDistance)
        {
            direction *= -1;
        }
    }
}

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🧠 Why this works well in 2D

• Uses Vector2 instead of Vector3
• Movement stays strictly on the X‑axis
• No Rigidbody2D required (unless you want physics‑based motion)
• Perfect for enemies, platforms, hazards, or decorative objects

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⚡ Want a different flavor?

I can give you versions for:

• Player‑controlled left/right movement (A/D or arrows)
• Rigidbody2D‑based movement
• Smooth sine‑wave bobbing
• Patrol between two specific points
• Auto‑flip sprite when changing direction