Fix level progression and word validation issues

- Add validation to prevent selecting all-caps words that appear in passages
- Implement proper 2-round requirement before level advancement
- Update UI to show progress feedback (e.g., "1/2 rounds completed")
- Fix bug where words like "VOLUME" were selected when visible in text

src/aiService.js

@@ -428,7 +428,7 @@ Return as JSON: {"passage1": {...}, "passage2": {...}}`
         parsed.passage2.words = parsed.passage2.words.filter(word => word && word.trim() !== '');
         
         // Filter problematic words and validate word lengths based on level
-        const validateWords = (words) => {
+        const validateWords = (words, passageText) => {
           const problematicWords = ['negro', 'retard', 'retarded', 'nigger', 'chinaman', 'jap', 'gypsy', 'savage', 'primitive', 'heathen'];
           return words.filter(word => {
             const cleanWord = word.replace(/[^a-zA-Z]/g, '');
@@ -437,6 +437,12 @@ Return as JSON: {"passage1": {...}, "passage2": {...}}`
             // Skip problematic words
             if (problematicWords.includes(lowerWord)) return false;
             
+            // Check if word appears in all caps in the passage (like "VOLUME")
+            if (passageText.includes(word.toUpperCase()) && word === word.toUpperCase()) {
+              console.log(`Skipping all-caps word: ${word}`);
+              return false;
+            }
+            
             // Check length constraints
             if (level <= 2) {
               return cleanWord.length >= 4 && cleanWord.length <= 7;
@@ -451,8 +457,8 @@ Return as JSON: {"passage1": {...}, "passage2": {...}}`
         const originalP1Count = parsed.passage1.words.length;
         const originalP2Count = parsed.passage2.words.length;
         
-        parsed.passage1.words = validateWords(parsed.passage1.words);
-        parsed.passage2.words = validateWords(parsed.passage2.words);
+        parsed.passage1.words = validateWords(parsed.passage1.words, passage1);
+        parsed.passage2.words = validateWords(parsed.passage2.words, passage2);
         
         console.log(`✅ Level ${level} batch validation: P1 ${parsed.passage1.words.length}/${originalP1Count}, P2 ${parsed.passage2.words.length}/${originalP2Count} words passed`);
         

src/app.js

@@ -69,9 +69,11 @@ class App {
       <strong>${roundData.title}</strong> by ${roundData.author}
     `;
 
-    // Show level information without passage number
+    // Show level information
     const blanksCount = roundData.blanks.length;
-    this.elements.roundInfo.innerHTML = `Level ${this.game.currentLevel} • ${blanksCount} blank${blanksCount > 1 ? 's' : ''}`;
+    const levelInfo = `Level ${this.game.currentLevel} • ${blanksCount} blank${blanksCount > 1 ? 's' : ''}`;
+    
+    this.elements.roundInfo.innerHTML = levelInfo;
 
     // Show contextualization from AI agent
     this.elements.contextualization.innerHTML = `
@@ -160,7 +162,13 @@ class App {
     }
     
     if (results.passed) {
-      message += ` - Excellent! Advancing to Level ${this.game.currentLevel + 1}! 🎉`;
+      // Check if this completes the requirements for level advancement
+      const roundsCompleted = this.game.roundsPassedAtCurrentLevel + 1; // +1 for this round
+      if (roundsCompleted >= 2) {
+        message += ` - Excellent! Advancing to Level ${this.game.currentLevel + 1}! 🎉`;
+      } else {
+        message += ` - Great job! ${roundsCompleted}/2 rounds completed for Level ${this.game.currentLevel + 1}`;
+      }
       this.elements.result.className = 'mt-4 text-center font-semibold text-green-600';
     } else {
       if (this.game.currentLevel >= 3) {

src/clozeGameEngine.js

@@ -25,6 +25,9 @@ class ClozeGame {
     this.currentBooks = []; // Array of two books per round
     this.passages = []; // Array of two passages per round
     this.currentPassageIndex = 0; // 0 for first passage, 1 for second
+    
+    // Level progression tracking
+    this.roundsPassedAtCurrentLevel = 0; // Track successful rounds at current level
   }
 
   async initialize() {
@@ -749,11 +752,21 @@ class ClozeGame {
     // Always increment round counter
     this.currentRound++;
     
-    // Only advance level if user passed the round
+    // Track successful rounds and advance level after 2 successful rounds
     if (roundPassed) {
-      this.currentLevel++;
+      this.roundsPassedAtCurrentLevel++;
+      console.log(`Round passed! Total rounds passed at level ${this.currentLevel}: ${this.roundsPassedAtCurrentLevel}`);
+      
+      // Advance level after 2 successful rounds
+      if (this.roundsPassedAtCurrentLevel >= 2) {
+        this.currentLevel++;
+        this.roundsPassedAtCurrentLevel = 0; // Reset counter for new level
+        console.log(`Advancing to level ${this.currentLevel} after 2 successful rounds`);
+      }
+    } else {
+      // Failed round - do not reset the counter, user must accumulate 2 passes
+      console.log(`Round failed. Still need ${2 - this.roundsPassedAtCurrentLevel} more passed round(s) to advance from level ${this.currentLevel}`);
     }
-    // If failed, stay at same level
     
     // Clear chat conversations for new round
     this.chatService.clearConversations();