I am working on a very basic test in Unity 2D. The problem I am having is when my sprite collides with the ground it is constantly checking the event, almost too frequently, so the sprite stays in limbo. It doesn't have a chance to leave the ground as by the time it does the check tells it to turn around resulting it quickly going up and down. As shown in the below clip:

https://m.youtube.com/watch?v=gPmmLjGe9iQ

What I want is when contact is made the sprite needs to change it's Y axis direction. Please see my code below.

void Update () {
    hitWall = Physics2D.OverlapCircle(wallCheckUp.position, wallCheckRadius, whatIsWall);
    if (hitWall)
    {
        moveUp = !moveUp;
    }

    if (moveUp)
    {
        transform.localScale = new Vector3(-1f, 1f, 1f);
        GetComponent<Rigidbody2D>().velocity = new Vector2(speed, GetComponent<Rigidbody2D>().velocity.x);
    }
    else
    {
        transform.localScale = new Vector3(1f, 1f, 1f);
        GetComponent<Rigidbody2D>().velocity = new Vector2(-speed, GetComponent<Rigidbody2D>().velocity.x);
    }
}

If more information is needed please let me know.

I am working on a very basic test in 2D. The problem I am having is that, when my sprite collides with the ground, it is checking the event too frequently. The sprite stays in limbo, as it doesn't have a chance to leave the ground. By the time it does, the check tells it to turn around, resulting it quickly going up and down. I uploaded an example clip to YouTube.

When contact is made, the sprite needs to change it's Y axis direction. How do I fix this? Please see my code, below:

void Update ()  
{
    hitWall = Physics2D.OverlapCircle(wallCheckUp.position, wallCheckRadius, whatIsWall); 

    if (hitWall)
    {
        moveUp = !moveUp;
    }

    if (moveUp)
    {
        transform.localScale = new Vector3(-1f, 1f, 1f);
        GetComponent<Rigidbody2D>().velocity 
            = new Vector2(speed, GetComponent<Rigidbody2D>().velocity.x);
    }
    else
    {
        transform.localScale = new Vector3(1f, 1f, 1f);
        GetComponent<Rigidbody2D>().velocity 
            = new Vector2(-speed, GetComponent<Rigidbody2D>().velocity.x);
    }
}

Here is my object: