diff --git a/web/assets/css/game.css b/web/assets/css/game.css
index cfb9c32..ff2335d 100644
--- a/web/assets/css/game.css
+++ b/web/assets/css/game.css
@@ -20,6 +20,71 @@ body {
     user-select: none;
 }
 
+.level-menu-shell {
+    position: fixed;
+    top: 24px;
+    right: 24px;
+    z-index: 1100;
+    display: flex;
+    align-items: flex-start;
+    gap: 10px;
+}
+
+.level-menu-toggle {
+    border: none;
+    border-radius: 999px;
+    background: #223;
+    color: #fff;
+    padding: 12px 18px;
+    font-size: 0.95rem;
+    font-weight: 700;
+    cursor: pointer;
+    box-shadow: 0 8px 20px rgba(34, 51, 68, 0.18);
+}
+
+.level-menu-panel {
+    min-width: 180px;
+    background: rgba(255, 255, 255, 0.96);
+    border-radius: 18px;
+    padding: 14px;
+    box-shadow: 0 18px 40px rgba(34, 51, 68, 0.18);
+    border: 1px solid rgba(34, 51, 68, 0.08);
+}
+
+.level-menu-panel h2 {
+    font-size: 0.95rem;
+    color: #223;
+    margin-bottom: 10px;
+}
+
+.level-menu-list {
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+
+.level-menu-item {
+    border: none;
+    border-radius: 10px;
+    padding: 10px 12px;
+    text-align: left;
+    background: #dfe5f8;
+    color: #223;
+    font-weight: 700;
+    cursor: pointer;
+}
+
+.level-menu-item.is-current {
+    background: #223;
+    color: #fff;
+}
+
+.level-menu-item:disabled {
+    background: #eceff7;
+    color: #8a92a3;
+    cursor: not-allowed;
+}
+
 main {
     display: flex;
     flex-direction: column;
diff --git a/web/assets/js/game.js b/web/assets/js/game.js
index c5668f2..ad0ce73 100644
--- a/web/assets/js/game.js
+++ b/web/assets/js/game.js
@@ -162,6 +162,8 @@ let rotatorIntervals = {};
 let toggledDoors = {};
 let poweredCaptors = {};
 let draggedGlassColor = null;
+let highestUnlockedLevelIndex = 0;
+const unlockedLevelsStorageKey = "mirror-game-highest-unlocked-level";
 
 function getCurrentLevel() {
     return levels[currentLevelIndex];
@@ -171,6 +173,107 @@ function getCurrentLevelConfig(configByLevel) {
     return configByLevel[currentLevelIndex] || {};
 }
 
+function loadUnlockedLevels() {
+    const savedValue = window.localStorage.getItem(unlockedLevelsStorageKey);
+    const parsedValue = Number.parseInt(savedValue || "0", 10);
+
+    if (Number.isNaN(parsedValue)) {
+        highestUnlockedLevelIndex = 0;
+        return;
+    }
+
+    highestUnlockedLevelIndex = Math.max(0, Math.min(parsedValue, levels.length - 1));
+}
+
+function saveUnlockedLevels() {
+    window.localStorage.setItem(unlockedLevelsStorageKey, String(highestUnlockedLevelIndex));
+}
+
+function unlockLevel(levelIndex) {
+    if (levelIndex <= highestUnlockedLevelIndex || levelIndex >= levels.length) {
+        return;
+    }
+
+    highestUnlockedLevelIndex = levelIndex;
+    saveUnlockedLevels();
+    renderLevelMenu();
+}
+
+function toggleLevelMenu() {
+    const levelMenuPanel = document.getElementById("level-menu-panel");
+    const levelMenuToggle = document.getElementById("level-menu-toggle");
+
+    if (!levelMenuPanel || !levelMenuToggle) {
+        return;
+    }
+
+    const isOpening = levelMenuPanel.hasAttribute("hidden");
+
+    if (isOpening) {
+        levelMenuPanel.removeAttribute("hidden");
+    } else {
+        levelMenuPanel.setAttribute("hidden", "");
+    }
+
+    levelMenuToggle.setAttribute("aria-expanded", String(isOpening));
+}
+
+function renderLevelMenu() {
+    const levelMenuList = document.getElementById("level-menu-list");
+
+    if (!levelMenuList) {
+        return;
+    }
+
+    levelMenuList.innerHTML = "";
+
+    for (let levelIndex = 0; levelIndex < levels.length; levelIndex++) {
+        const levelButton = document.createElement("button");
+        const isUnlocked = levelIndex <= highestUnlockedLevelIndex;
+        const isCurrentLevel = levelIndex === currentLevelIndex;
+
+        levelButton.type = "button";
+        levelButton.classList.add("level-menu-item");
+        levelButton.textContent = isUnlocked ? `Level ${levelIndex + 1}` : `Level ${levelIndex + 1} - Locked`;
+        levelButton.disabled = !isUnlocked;
+
+        if (isCurrentLevel) {
+            levelButton.classList.add("is-current");
+        }
+
+        levelButton.addEventListener("click", () => {
+            if (!isUnlocked) {
+                return;
+            }
+
+            goToLevel(levelIndex);
+            const levelMenuPanel = document.getElementById("level-menu-panel");
+            const levelMenuToggle = document.getElementById("level-menu-toggle");
+
+            if (levelMenuPanel) {
+                levelMenuPanel.setAttribute("hidden", "");
+            }
+
+            if (levelMenuToggle) {
+                levelMenuToggle.setAttribute("aria-expanded", "false");
+            }
+        });
+
+        levelMenuList.appendChild(levelButton);
+    }
+}
+
+function setupLevelMenu() {
+    const levelMenuToggle = document.getElementById("level-menu-toggle");
+
+    if (!levelMenuToggle) {
+        return;
+    }
+
+    levelMenuToggle.addEventListener("click", toggleLevelMenu);
+    renderLevelMenu();
+}
+
 function getCurrentGlassOptions() {
     return glassOptions[currentLevelIndex] || [];
 }
@@ -892,22 +995,19 @@ function traceLaser() {
 }
 
 function finish() {
+    unlockLevel(currentLevelIndex + 1);
+
     setTimeout(() => {
         const winOverlay = document.querySelector(".win-overlay");
         winOverlay.style.visibility = "visible";
     }, 100);
 }
 
-function nextLevel() {
-    currentLevelIndex++;
-
+function goToLevel(levelIndex) {
+    currentLevelIndex = levelIndex;
     isLevelFinished = false;
     stopAllRotatorButtons();
 
-    if (currentLevelIndex >= levels.length) {
-        currentLevelIndex = 0;
-    }
-
     initializeMirrorOrientations();
     glassPlacements = {};
     resetGlassInventory();
@@ -923,10 +1023,18 @@ function nextLevel() {
 
     const winOverlay = document.querySelector(".win-overlay");
     winOverlay.style.visibility = "hidden";
+    renderLevelMenu();
 }
 
+function nextLevel() {
+    const nextLevelIndex = currentLevelIndex + 1 >= levels.length ? 0 : currentLevelIndex + 1;
+    goToLevel(nextLevelIndex);
+}
+
+loadUnlockedLevels();
 resetGlassInventory();
 createPalette();
 initializeMirrorOrientations();
 blockBrowserDrop();
+setupLevelMenu();
 traceLaser();
diff --git a/web/templates/view/game.html b/web/templates/view/game.html
index 8ee4b57..a0351a0 100644
--- a/web/templates/view/game.html
+++ b/web/templates/view/game.html
@@ -15,6 +15,16 @@
       <button class="win-button" onclick="nextLevel()">Next Level</button>
     </div>
 
+    <aside class="level-menu-shell">
+        <button id="level-menu-toggle" class="level-menu-toggle" type="button" aria-expanded="false" aria-controls="level-menu-panel">
+            Levels
+        </button>
+        <div id="level-menu-panel" class="level-menu-panel" hidden>
+            <h2>Choose Level</h2>
+            <div id="level-menu-list" class="level-menu-list"></div>
+        </div>
+    </aside>
+
     <script>
         atOptions = {
           'key' : '72b6ba1a1c26b9671167b66063c7e699',