Add booster pack item

Assets/Scripts/Interactions/BoosterGlowEffect.cs

@@ -0,0 +1,33 @@
+using UnityEngine;
+
+namespace Interactions
+{
+    /// <summary>
+    /// Simple glow effect component for booster pack pickups.
+    /// Attach to a GameObject with a SpriteRenderer for basic glow visual.
+    /// The BoosterPackPickup will handle the scale animation.
+    /// </summary>
+    [RequireComponent(typeof(SpriteRenderer))]
+    public class BoosterGlowEffect : MonoBehaviour
+    {
+        [Header("Glow Settings")]
+        [SerializeField] private Color glowColor = Color.yellow;
+        [SerializeField] private float baseAlpha = 0.5f;
+        
+        private SpriteRenderer spriteRenderer;
+        
+        private void Awake()
+        {
+            spriteRenderer = GetComponent<SpriteRenderer>();
+            
+            // Apply glow color with alpha
+            Color color = glowColor;
+            color.a = baseAlpha;
+            spriteRenderer.color = color;
+            
+            // Set sorting order to be behind the item
+            spriteRenderer.sortingOrder = -1;
+        }
+    }
+}
+