We've got enemies and movement!!

Assets/_Project/Scripts/Gameplay/EnemyDefinition.cs

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+// Assets/_Project/Scripts/Gameplay/EnemyDefinition.cs
+using UnityEngine;
+
+namespace TD.Gameplay
+{
+    /// <summary>
+    /// Data definition for a single enemy type. One asset per type; shared across all
+    /// instances spawned in a match. Consumed by <see cref="WaveManager"/> at spawn time.
+    /// </summary>
+    /// <remarks>
+    /// Follows the same ScriptableObject pattern as <c>TowerDefinition</c>: data lives
+    /// in project assets, only the asset reference (or its fields) crosses runtime code.
+    /// Replace <see cref="EnemyPrefab"/> with a real mesh/animator when art is ready —
+    /// no code changes required.
+    /// </remarks>
+    [CreateAssetMenu(fileName = "EnemyDefinition", menuName = "TD/Enemy Definition", order = 3)]
+    public class EnemyDefinition : ScriptableObject
+    {
+        [Header("Identity")]
+        [Tooltip("Human-readable name shown in debug logs and future enemy-info UI.")]
+        public string DisplayName;
+
+        [Header("Stats")]
+        [Tooltip("Maximum hit points for this enemy type.")]
+        public float MaxHp = 100f;
+
+        [Tooltip("Movement speed in world units per second along the A* path.")]
+        public float MoveSpeed = 3f;
+
+        [Tooltip("When true this enemy flies over tower footprints. " +
+                 "Towers with GroundedOnly=true will not target it. " +
+                 "Flying enemies follow the same A* path but are not physically " +
+                 "blocked by tower colliders (handled in EnemyMovement).")]
+        public bool IsFlying;
+
+        [Header("Rewards / Costs")]
+        [Tooltip("Gold awarded to the player whose tower lands the killing blow.")]
+        public int GoldReward = 10;
+
+        [Tooltip("Number of lives deducted from the shared pool when this enemy " +
+                 "reaches the Goal. Boss enemies might cost 2 or more lives.")]
+        public int LivesCost = 1;
+
+        [Header("Visuals")]
+        [Tooltip("Prefab spawned in the world for this enemy. Must have NetworkObject, " +
+                 "NetworkTransform, EnemyHealth, EnemyStatus, and EnemyMovement at its root. " +
+                 "Place it on the Enemy physics layer.")]
+        public GameObject EnemyPrefab;
+    }
+}