diff --git a/UNIFIED_API.md b/UNIFIED_API.md
index b7a1173..1d17ae6 100644
--- a/UNIFIED_API.md
+++ b/UNIFIED_API.md
@@ -132,6 +132,7 @@ type GameManager = {
   getKeyLog: () => KeyLogEntry[];
   
   // Optional: Game-specific additions
+  changeGameMode?: (options: GameOptions) => void;  // Runtime option changes
   // [additional fields as needed]
 };
 ```
@@ -201,6 +202,29 @@ type ScoreManager = {
 };
 ```
 
+**typing-chud Content Tracking:**
+
+All content types are tracked independently throughout the game:
+
+```typescript
+type ScoreManager = {
+  // ... core fields
+  
+  lettersCompleted: number;      // Total letters typed
+  wordsCompleted: number;        // Total words typed
+  sentencesCompleted: number;    // Total sentences typed
+  paragraphsCompleted: number;   // Total paragraphs typed
+  currentCount: number;          // Count for current game mode
+};
+```
+
+**Platform Mode Switching Behavior:**
+
+When platform calls `changeGameMode()`:
+- All historical counts remain (letters stay at 10 after switching to words)
+- `currentCount` reflects the mode-specific count (0 for words if no words typed yet)
+- Each mode accumulates independently
+
 **Scoring Requirements:**
 - Score range: 0-1000 (capped)
 - Score calculated on game-won
@@ -209,6 +233,39 @@ type ScoreManager = {
 
 ---
 
+## Runtime Game Control
+
+Some games support dynamic option changes during gameplay via `changeGameMode()`:
+
+```typescript
+// Change to a different mode mid-game
+game.changeGameMode({ gameMode: 'words', downwardSpeed: 75 });
+```
+
+### Delayed Mode Switching (typing-chud)
+
+Mode changes are deferred to respect current gameplay:
+- Changes are stored as "pending options"
+- Applied AFTER current letter/word/sentence/paragraph completes
+- OR when player dies (text hits ship)
+- Multiple rapid calls overwrite with latest options
+- Ensures smooth transitions without interrupting input
+
+**Flow:**
+```
+Platform calls changeGameMode()
+   ↓
+Options stored as pending
+   ↓
+Player finishes current letter/word
+   ↓
+Pending options applied
+   ↓
+Next letter spawns with new settings
+```
+
+---
+
 ## Game-Specific Flexibility
 
 These elements CAN vary between games:
@@ -232,6 +289,14 @@ type GameOptions = {
   timeLimit?: number;
 };
 
+// typing-chud (Unified Platform Control)
+type GameOptions = {
+  gameMode?: 'letters' | 'words' | 'sentences' | 'paragraphs';
+  downwardSpeed?: number;           // px/s (mode-agnostic)
+  boardDimensions?: [number, number]; // [width, height]
+  wordList?: string[];              // Custom word/sentence/paragraph list
+};
+
 // vim-snake (hypothetical)
 type GameOptions = {
   boardSize?: number;
@@ -245,6 +310,13 @@ type GameOptions = {
 - Make most options optional
 - Use consistent naming (e.g., `timeLimit` always in seconds)
 
+**Platform Control (typing-chud):**
+- Platforms have full control over game behavior via `GameOptions`
+- `downwardSpeed` is mode-agnostic (single value for all modes)
+- `wordList` allows custom content across all modes
+- `changeGameMode(options)` allows runtime mode switching
+- Mode changes respect current gameplay (apply after letter/word completes or death)
+
 ### 2. Scoring Implementation
 
 Complete freedom in how scoring works internally:
@@ -449,6 +521,11 @@ type ScoreManager = {
 - Additional metrics for display
 - Difficulty multipliers
 
+**typing-chud Content Tracking:**
+- Tracks all content types independently (letters, words, sentences, paragraphs)
+- Preserves historical counts when mode switches
+- `currentCount` reflects only the current game mode count
+
 ### useGameStatus
 
 **Purpose:** Manage game lifecycle state machine.
@@ -472,6 +549,8 @@ type GameStatusManager = {
   quitGame: () => void;
   
   // Optional: togglePause, reset, etc.
+  // Optional: setPendingOptions (for runtime changes)
+  setPendingOptions?: (options: GameOptions) => void;
 };
 ```
 
@@ -855,6 +934,16 @@ interface UnifiedGame {
 
 ## Version History
 
+**v2.1** (2025-11-04)
+- Added delayed mode switching for runtime game control
+- Documented `changeGameMode()` for platforms
+- Added `GameOptions` for platform control (gameMode, downwardSpeed, wordList)
+- Clarified pending options pattern for smooth transitions
+- Updated GameManager interface with optional runtime control methods
+- Added content tracking per mode (letters, words, sentences, paragraphs)
+- `currentCount` reflects mode-specific completion count
+- Historical counts preserved across mode switches
+
 **v2.0** (2025-01-22)
 - Rewritten for game-agnostic specification
 - Clarified requirements vs flexibility
diff --git a/src/types.ts b/src/types.ts
index 75e148b..75437cb 100755
--- a/src/types.ts
+++ b/src/types.ts
@@ -105,38 +105,50 @@ export type CursorManager = {
 // ============================================================================
 
 export type ScoreManager = {
-  timeValue: number;
-  totalKeystrokes: number;
-  score: number;
-  correct: number;
-  missed: number;
-  deaths: number;
-};
+   timeValue: number;
+   totalKeystrokes: number;
+   score: number;
+   correct: number;
+   missed: number;
+   deaths: number;
+   lettersCompleted: number;
+   wordsCompleted: number;
+   sentencesCompleted: number;
+   paragraphsCompleted: number;
+   currentCount: number; // Count for current game mode
+ };
 
 // ============================================================================
 // Manager Interfaces - Game Status
 // ============================================================================
 
 export type GameStatusManager = {
-  gameStatus: GameStatus;
-  setGameStatus: (status: GameStatus) => void;
-  startGame: () => void;
-  quitGame: () => void;
-  level: number;
-  shipState: ShipState;
-  shipExplosionTime: number;
-  updatePlayerX: (x: number) => void;
-  handleTypedLetter: (letter: string) => void;
-  setGameLoopCallback: (callback: (deltaTime: number, letters: FallingLetter[]) => void) => void;
-  setGameMode: (mode: GameMode) => void;
-  addCorrect: () => void;
-  addMissed: () => void;
-  addDeath: () => void;
-  score: number;
-  correct: number;
-  missed: number;
-  deaths: number;
-};
+   gameStatus: GameStatus;
+   setGameStatus: (status: GameStatus) => void;
+   startGame: () => void;
+   quitGame: () => void;
+   level: number;
+   shipState: ShipState;
+   shipExplosionTime: number;
+   updatePlayerX: (x: number) => void;
+   handleTypedLetter: (letter: string) => void;
+   setGameLoopCallback: (callback: (deltaTime: number, letters: FallingLetter[]) => void) => void;
+   setGameMode: (mode: GameMode) => void;
+   setPendingOptions: (options: GameOptions) => void;
+   addCorrect: () => void;
+   addMissed: () => void;
+   addDeath: () => void;
+   trackCompletion: (mode: GameMode) => void;
+   score: number;
+   correct: number;
+   missed: number;
+   deaths: number;
+   lettersCompleted: number;
+   wordsCompleted: number;
+   sentencesCompleted: number;
+   paragraphsCompleted: number;
+   getCurrentCount: () => number;
+ };
 
 // ============================================================================
 // Manager Interfaces - Key Tracking
diff --git a/src/useGame/useGame.ts b/src/useGame/useGame.ts
index f8b5dec..92d0be4 100755
--- a/src/useGame/useGame.ts
+++ b/src/useGame/useGame.ts
@@ -69,10 +69,10 @@ export function useGame(
     gameStatusManager.setGameMode(gameMode);
   }, [gameMode]);
 
-  const changeGameMode = (newOptions: GameOptions) => {
-    setOptions(newOptions);
-    // Don't quit - just switch modes and let game continue
-  };
+   const changeGameMode = (newOptions: GameOptions) => {
+     setOptions(newOptions);
+     gameStatusManager.setPendingOptions(newOptions);
+   };
 
   // Set the game loop callback
   useEffect(() => {
diff --git a/src/useGameStatus/useGameStatus.ts b/src/useGameStatus/useGameStatus.ts
index 4eafe06..ed7f9aa 100755
--- a/src/useGameStatus/useGameStatus.ts
+++ b/src/useGameStatus/useGameStatus.ts
@@ -23,6 +23,7 @@ export function useGameStatus(_onGameLoopTick?: (deltaTime: number, letters: Fal
   // Store options in refs so they can be accessed in the game loop
   const downwardSpeedRef = useRef<number | undefined>(downwardSpeed);
   const wordListRef = useRef<string[] | undefined>(wordList);
+  const pendingOptionsRef = useRef<GameOptions | null>(null);
   
   // Update refs when options change
   useEffect(() => {
@@ -33,13 +34,17 @@ export function useGameStatus(_onGameLoopTick?: (deltaTime: number, letters: Fal
     wordListRef.current = wordList;
   }, [wordList]);
   
-  const [gameStatus, setGameStatus] = useState<GameStatus>("waiting");
-  const shipStateRef = useRef<ShipState>("normal");
-  const shipExplosionTimeRef = useRef<number>(0);
-  const [score, setScore] = useState(0);
-  const [correct, setCorrect] = useState(0);
-  const [missed, setMissed] = useState(0);
-  const [deaths, setDeaths] = useState(0);
+   const [gameStatus, setGameStatus] = useState<GameStatus>("waiting");
+   const shipStateRef = useRef<ShipState>("normal");
+   const shipExplosionTimeRef = useRef<number>(0);
+   const [score, setScore] = useState(0);
+   const [correct, setCorrect] = useState(0);
+   const [missed, setMissed] = useState(0);
+   const [deaths, setDeaths] = useState(0);
+   const [lettersCompleted, setLettersCompleted] = useState(0);
+   const [wordsCompleted, setWordsCompleted] = useState(0);
+   const [sentencesCompleted, setSentencesCompleted] = useState(0);
+   const [paragraphsCompleted, setParagraphsCompleted] = useState(0);
   const gameLoopRef = useRef<number | null>(null);
   const lastFrameTimeRef = useRef<number>(0);
   const lettersRef = useRef<FallingLetter[]>([]);
@@ -132,6 +137,8 @@ export function useGameStatus(_onGameLoopTick?: (deltaTime: number, letters: Fal
             lastSpawnRef.current = performance.now();
             shipStateRef.current = 'normal';
             shipExplosionTimeRef.current = 0;
+            // Apply pending options after death
+            applyPendingOptions();
           }, 500); // Match the 500ms explosion animation
         }
       }
@@ -265,16 +272,19 @@ export function useGameStatus(_onGameLoopTick?: (deltaTime: number, letters: Fal
         }
       }
 
-      // Check if word is complete
-      if (charIndex >= fullText.length) {
-        // Word complete - explode and clear
-        currentLetter.state = 'exploding';
-        currentLetter.stateStartTime = performance.now();
-        
-        setTimeout(() => {
-          lettersRef.current = [];
-          lastSpawnRef.current = 0;
-        }, 300);
+       // Check if word is complete
+       if (charIndex >= fullText.length) {
+         // Word complete - explode and clear
+         currentLetter.state = 'exploding';
+         currentLetter.stateStartTime = performance.now();
+         trackCompletion(gameModeRef.current);
+         
+         setTimeout(() => {
+           lettersRef.current = [];
+           lastSpawnRef.current = 0;
+           // Apply pending options after letter completes
+           applyPendingOptions();
+         }, 300);
       } else {
         // More characters to type - advance to next character
         currentLetter.charIndex = charIndex;
@@ -319,6 +329,32 @@ export function useGameStatus(_onGameLoopTick?: (deltaTime: number, letters: Fal
     gameModeRef.current = mode;
   };
 
+  const setPendingOptions = (newOptions: GameOptions) => {
+    pendingOptionsRef.current = newOptions;
+  };
+
+  const applyPendingOptions = () => {
+    if (!pendingOptionsRef.current) return;
+    
+    const pending = pendingOptionsRef.current;
+    pendingOptionsRef.current = null;
+    
+    // Update game mode
+    if (pending.gameMode) {
+      gameModeRef.current = pending.gameMode;
+    }
+    
+    // Update speed ref
+    if (pending.downwardSpeed !== undefined) {
+      downwardSpeedRef.current = pending.downwardSpeed;
+    }
+    
+    // Update word list ref
+    if (pending.wordList !== undefined) {
+      wordListRef.current = pending.wordList;
+    }
+  };
+
   const addCorrect = () => {
     setScore(prev => prev + 1);
     setCorrect(prev => prev + 1);
@@ -329,29 +365,62 @@ export function useGameStatus(_onGameLoopTick?: (deltaTime: number, letters: Fal
     setMissed(prev => prev + 1);
   };
 
-  const addDeath = () => {
-    setDeaths(prev => prev + 1);
-  };
+   const addDeath = () => {
+     setDeaths(prev => prev + 1);
+   };
 
-  return {
-    gameStatus,
-    setGameStatus,
-    startGame,
-    quitGame,
-    handleTypedLetter,
-    shipState: shipStateRef.current,  // Return ref value for immediate updates
-    shipExplosionTime: shipExplosionTimeRef.current,  // Return ref value for immediate updates
-    updatePlayerX,
-    setGameLoopCallback,
-    setGameMode,
-    addCorrect,
-    addMissed,
-    addDeath,
-    score,
-    correct,
-    missed,
-    deaths,
-  };
-}
+   const trackCompletion = (mode: GameMode) => {
+     if (mode === 'letters') {
+       setLettersCompleted(prev => prev + 1);
+     } else if (mode === 'words') {
+       setWordsCompleted(prev => prev + 1);
+     } else if (mode === 'sentences') {
+       setSentencesCompleted(prev => prev + 1);
+     } else if (mode === 'paragraphs') {
+       setParagraphsCompleted(prev => prev + 1);
+     }
+   };
+
+   const getCurrentCount = (): number => {
+     const mode = gameModeRef.current;
+     if (mode === 'letters') {
+       return lettersCompleted;
+     } else if (mode === 'words') {
+       return wordsCompleted;
+     } else if (mode === 'sentences') {
+       return sentencesCompleted;
+     } else if (mode === 'paragraphs') {
+       return paragraphsCompleted;
+     }
+     return 0;
+   };
+
+   return {
+     gameStatus,
+     setGameStatus,
+     startGame,
+     quitGame,
+     handleTypedLetter,
+     shipState: shipStateRef.current,  // Return ref value for immediate updates
+     shipExplosionTime: shipExplosionTimeRef.current,  // Return ref value for immediate updates
+     updatePlayerX,
+     setGameLoopCallback,
+     setGameMode,
+     setPendingOptions,
+     addCorrect,
+     addMissed,
+     addDeath,
+     trackCompletion,
+     score,
+     correct,
+     missed,
+     deaths,
+     lettersCompleted,
+     wordsCompleted,
+     sentencesCompleted,
+     paragraphsCompleted,
+     getCurrentCount,
+   };
+ }
 
 export type UseGameStatusType = ReturnType<typeof useGameStatus>;
diff --git a/src/useScore/useScore.ts b/src/useScore/useScore.ts
index 753acdc..12ea1fa 100755
--- a/src/useScore/useScore.ts
+++ b/src/useScore/useScore.ts
@@ -14,14 +14,19 @@ export function useScore(gameStatusManager: any): ScoreManager {
     return () => clearInterval(interval);
   }, [gameStatusManager.gameStatus]);
 
-  return {
-    timeValue,
-    totalKeystrokes: 0, // TODO: Track keystrokes from keyboard input
-    score: gameStatusManager.score,
-    correct: gameStatusManager.correct,
-    missed: gameStatusManager.missed,
-    deaths: gameStatusManager.deaths,
-  };
-}
+   return {
+     timeValue,
+     totalKeystrokes: 0, // TODO: Track keystrokes from keyboard input
+     score: gameStatusManager.score,
+     correct: gameStatusManager.correct,
+     missed: gameStatusManager.missed,
+     deaths: gameStatusManager.deaths,
+     lettersCompleted: gameStatusManager.lettersCompleted,
+     wordsCompleted: gameStatusManager.wordsCompleted,
+     sentencesCompleted: gameStatusManager.sentencesCompleted,
+     paragraphsCompleted: gameStatusManager.paragraphsCompleted,
+     currentCount: gameStatusManager.getCurrentCount(),
+   };
+ }
 
 export type UseScoreType = ReturnType<typeof useScore>;