Tiubert

private void OnCollisionEnter(Collision other)
    {
        var normal = other.GetContact(0).normal;
    
        var collisionTransform = other.transform;
    
        if (normal == collisionTransform.up)
        {
            Debug.Log("Top");
        }
        
        if (normal == -collisionTransform.up)
        {
            Debug.Log("Down");
        }
        
        if (normal == collisionTransform.right)
        {
            Debug.Log("Right");
        }
        
        if (normal == -collisionTransform.right)
        {
            Debug.Log("Left");
        }
        
        if (normal == collisionTransform.forward)
        {
            Debug.Log("forward");
        }

        if (normal == -collisionTransform.forward)
        {
            Debug.Log("back");
        }
    }