feat: Phase 1 complete - attack system, enemy damage, timers, and study notes summary

Assets/Enemy.cs

@@ -0,0 +1,42 @@
+using UnityEngine;
+
+public class Enemy : MonoBehaviour
+{
+    private SpriteRenderer sr;
+    [SerializeField]private float redColorDuration = 1;
+    public float currentTimeInGame;
+    public float lastTimeWasDamaged;
+
+    private void Awake()
+    {
+        sr = GetComponent<SpriteRenderer>();
+    }
+
+    private void Update()
+    {
+        ChanceColorIfNeedes();
+    }
+
+    private void ChanceColorIfNeedes()
+    {
+        currentTimeInGame = Time.time;
+        if (currentTimeInGame > lastTimeWasDamaged + redColorDuration)
+        {
+            if (sr.color != Color.white)
+            {
+                TurnWhite();
+            }
+        }
+    }
+
+    public void TakeDamage()
+    {
+        sr.color = Color.red;
+        lastTimeWasDamaged = Time.time;
+    }
+
+    private void TurnWhite()
+    {
+        sr.color = Color.white;
+    }
+}