Why is my player spinning after a collision?

Question

I've made a very simple 2D top down prototype with Unity. This is the code I use for the player:

public class PlayerTurnsController : MonoBehaviour
{
    private Rigidbody2D m_rb;
    public float Speed;

    Vector2 m_movement;

    void Start()
    {
        m_rb = GetComponent<Rigidbody2D>();
    }

    private void Update()
    {
        var moveHorizontal = Input.GetAxis("Horizontal");
        var moveVertical = Input.GetAxis("Vertical");
        m_movement = new Vector2(moveHorizontal, moveVertical);
    }

    void FixedUpdate()
    {
        m_rb.MovePosition(m_rb.position + m_movement * Speed * Time.fixedDeltaTime);
    }
}

At the start and while moving everything seems OK. But when I bump into some Colliders, the player sprite starts spinning when it should just stop (not pressing any button anymore)

I already tried:

• To set the rotation only when the m_Movement-Vector is > 0.1f. But this didn't change anything.

Answer 1

With the help of DMGregory I solved my problem.

The way I chose is to set "Freeze Rotation Z" of the Regidbody 2D via the inspector.

An other way is to increase the angularDrag of the Regidbody 2D via the inspector to e.g. 10.

This works too:

void Start()
{
    m_rb = GetComponent<Rigidbody2D>();
    m_rb.freezeRotation = true;
}

Also does:

void FixedUpdate()
{
    m_rb.MovePosition(m_rb.position + m_movement * Speed * Time.fixedDeltaTime);
    m_rb.angularVelocity = 0;
}

Im not sure which method is the best or which one to use when, but for the moment I chose "Freeze Rotation Z" = true in the inspector.