Ratbots deal damage to the player upon contact

Assets/Ratbot.cs

@@ -3,7 +3,10 @@ using UnityEngine;
 public class Ratbot : MonoBehaviour
 {
 	public float moveSpeed;
+	public float damageStrength;
+	public float damageTimeoutSeconds;
 	GameObject player;
+	float lastDamageTime;
     // Start is called once before the first execution of Update after the MonoBehaviour is created
     void Start()
     {
@@ -17,4 +20,11 @@ public class Ratbot : MonoBehaviour
 		Vector2 direction = (player.transform.position - transform.position).normalized;
 		controller.linearVelocity = direction*moveSpeed;
     }
+	void OnCollisionStay2D(Collision2D collision) {
+		// Deal damage when colliding with the player on a 0.5 second cooldown
+		if (collision.gameObject.tag != "Player") return;
+		if (lastDamageTime > Time.fixedTime-damageTimeoutSeconds) return;
+		lastDamageTime = Time.fixedTime;
+		collision.gameObject.GetComponent<Teo>().health -= damageStrength;
+	}
 }

Assets/Ratbot.prefab

@@ -15,7 +15,7 @@ GameObject:
   - component: {fileID: 3449798187735636588}
   m_Layer: 0
   m_Name: Ratbot
-  m_TagString: Untagged
+  m_TagString: Ratbot
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
@@ -103,6 +103,7 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   moveSpeed: 9.3
+  damageTimeoutSeconds: 0.5
 --- !u!61 &8441426735084966298
 BoxCollider2D:
   m_ObjectHideFlags: 0