FlyingFred/Assets/CharacterController.cs

using UnityEngine;

public class CharacterController : MonoBehaviour
{
    public Rigidbody characterRigidbody;
    public float swingForce = 10f;
    public float Health;
    public HingeJoint SpineHingeJoint;

    void Update()
    {
        // Control the character with horizontal input
        float input = Input.GetAxis("Horizontal");
        characterRigidbody.AddForce(Vector2.right * input * swingForce);
    }
    private void OnCollisionEnter(Collision collision)
    {
        Debug.Log("Collided with: "+collision.gameObject.name);
        if(collision.gameObject.layer==LayerMask.NameToLayer("Obstacle"))
        {
            Health -= 0.5f;
            UIManager.instance.UpdateHealth();
        }
    }
}