Adding Text Mesh Pro, new enemies, new enemy waves, new HUD functionality, New animators, a retry function, and floating text for gold earned and lives lost.

Assets/_Project/Scripts/Dev/DevWaveControls.cs

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+// Assets/_Project/Scripts/Dev/DevWaveControls.cs
+using Unity.Netcode;
+using UnityEngine;
+using UnityEngine.InputSystem;
+using TD.Gameplay;
+
+namespace TD.Dev
+{
+    /// <summary>
+    /// Editor / testing convenience: shows an OnGUI button in the top-left
+    /// corner that force-advances the wave on the server. Add this component
+    /// to any GameObject in the scene (e.g. a "DevTools" empty) during testing,
+    /// disable or remove for shipping builds.
+    /// </summary>
+    /// <remarks>
+    /// The button calls <see cref="WaveManager.ForceAdvanceToNextWave"/>, which
+    /// despawns active enemies, stops the current wave's coroutine, and starts
+    /// the next wave with no prep delay.
+    ///
+    /// Server-side only — the OnGUI button is gated to <c>NetworkManager.IsServer</c>
+    /// so clients connected to a remote host don't see it. The hotkey path is
+    /// also server-gated to avoid surprising results when pressed on a client.
+    /// </remarks>
+    public class DevWaveControls : MonoBehaviour
+    {
+        [Tooltip("Keyboard shortcut to force-advance to the next wave. " +
+                 "Uses the new Input System (UnityEngine.InputSystem.Key). " +
+                 "Set to Key.None to use the OnGUI button only.")]
+        [SerializeField] private Key hotkey = Key.F9;
+
+        private void Update()
+        {
+            if (hotkey == Key.None) return;
+
+            var kb = Keyboard.current;
+            if (kb == null) return; // no keyboard connected (e.g. headless server)
+            if (!kb[hotkey].wasPressedThisFrame) return;
+
+            TryForceNextWave();
+        }
+
+        private void OnGUI()
+        {
+            // Only show the button on the server (host or dedicated). Clients
+            // calling this from afar would no-op anyway.
+            if (NetworkManager.Singleton == null || !NetworkManager.Singleton.IsServer)
+                return;
+
+            // Anchored below the top HUD bar so it doesn't overlap gold/wave/lives.
+            const float topOffset = 90f;
+            GUI.Box(new Rect(10, topOffset, 180, 60), "Dev: Wave Controls");
+            if (GUI.Button(new Rect(20, topOffset + 25, 160, 28), "Force Next Wave"))
+                TryForceNextWave();
+        }
+
+        private void TryForceNextWave()
+        {
+            if (NetworkManager.Singleton == null || !NetworkManager.Singleton.IsServer)
+            {
+                Debug.LogWarning("[DevWaveControls] Force-advance requested off the server. Ignored.");
+                return;
+            }
+
+            var wm = WaveManager.Instance;
+            if (wm == null)
+            {
+                Debug.LogWarning("[DevWaveControls] WaveManager.Instance is null. " +
+                                 "Is the scene running with a WaveManager network-spawned?");
+                return;
+            }
+
+            Debug.Log("[DevWaveControls] Forcing next wave.");
+            wm.ForceAdvanceToNextWave();
+        }
+    }
+}

Assets/_Project/Scripts/Dev/DevWaveControls.cs.meta

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+fileFormatVersion: 2
+guid: 468de2ce61e73ce4595ba4792874b076