diff --git a/public/click1.mp3 b/public/click1.mp3
new file mode 100644
index 0000000..1dcaefa
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diff --git a/public/click2.mp3 b/public/click2.mp3
new file mode 100644
index 0000000..c5ca6c4
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diff --git a/public/click3.mp3 b/public/click3.mp3
new file mode 100644
index 0000000..d38cb51
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diff --git a/public/levelup.mp3 b/public/levelup.mp3
new file mode 100644
index 0000000..7422491
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diff --git a/public/onPurchase.mp3 b/public/onPurchase.mp3
new file mode 100644
index 0000000..8f9749e
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diff --git a/public/upgrade.mp3 b/public/upgrade.mp3
new file mode 100644
index 0000000..1b1908d
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diff --git a/public/upgrade.mp3.bak b/public/upgrade.mp3.bak
new file mode 100644
index 0000000..3ad5679
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diff --git a/src/App.tsx b/src/App.tsx
index 5c72efe..aa73f85 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -3,6 +3,7 @@ import { BuildingButton } from './components/BuildingButton'
 import { NextBuildingPreview } from './components/NextBuildingPreview'
 import { ResetButton } from './components/ResetButton'
 import { useGameStore } from './store/gameStore'
+import { playClickSound, initAudio } from './utils/soundUtils'
 import { 
   ChakraProvider, 
   Box, 
@@ -62,7 +63,9 @@ function App() {
     const handleKeyPress = (e: KeyboardEvent) => {
       // Only allow clicks after terms are accepted and modal is closed
       if (hasStarted) {
-        click()
+        console.log('Key pressed:', e.key);
+        playClickSound(); // Play click sound
+        click();
       }
     }
 
@@ -74,13 +77,17 @@ function App() {
   const handleClick = (e: React.MouseEvent) => {
     // Only allow clicks after terms are accepted and modal is closed
     if (hasStarted) {
-      click()
+      console.log('Mouse clicked');
+      playClickSound(); // Play click sound
+      click();
     }
   }
 
   // Handle starting the game
   const handleStartGame = () => {
     if (agreedToTerms) {
+      // Initialize audio on first user interaction
+      initAudio();
       setHasStarted(true)
       onClose()
     }
diff --git a/src/components/ResourceDisplay.tsx b/src/components/ResourceDisplay.tsx
index dcbfdea..053a90a 100644
--- a/src/components/ResourceDisplay.tsx
+++ b/src/components/ResourceDisplay.tsx
@@ -2,6 +2,7 @@ import { Box, HStack, Text, Progress, Flex, Divider, Tooltip, Image } from '@cha
 import { useGameStore } from '../store/gameStore'
 import logoImg from '../assets/logo.png'
 import { ResetButton } from './ResetButton'
+import { SoundToggleButton } from './SoundToggleButton'
 
 export function ResourceDisplay() {
   const { points, pointsPerSecond, clickPower, playerLevel } = useGameStore()
@@ -57,16 +58,19 @@ export function ResourceDisplay() {
           />
         </Box>
 
-        {/* Reset button */}
-        <Box 
+        {/* Control buttons */}
+        <Flex 
           position="absolute" 
           right={4} 
           top="50%" 
           transform="translateY(-50%)"
           zIndex={1}
+          gap={2}
+          align="center"
         >
+          <SoundToggleButton />
           <ResetButton />
-        </Box>
+        </Flex>
 
         {/* Main content - centered */}
         <Flex 
diff --git a/src/components/SoundToggleButton.tsx b/src/components/SoundToggleButton.tsx
new file mode 100644
index 0000000..13ffec0
--- /dev/null
+++ b/src/components/SoundToggleButton.tsx
@@ -0,0 +1,28 @@
+import { IconButton, Tooltip, useBoolean } from '@chakra-ui/react'
+import { toggleSound, isSoundEnabled, initAudio } from '../utils/soundUtils'
+import { useEffect, useState } from 'react'
+
+export function SoundToggleButton() {
+  // Initialize the state with the current sound enabled state
+  const [soundOn, setSoundOn] = useState(isSoundEnabled())
+  
+  const handleToggle = () => {
+    // Initialize audio when toggling (helps with browser autoplay policies)
+    initAudio();
+    const newState = toggleSound()
+    setSoundOn(newState)
+  }
+  
+  return (
+    <Tooltip label={soundOn ? 'Mute sounds' : 'Enable sounds'}>
+      <IconButton
+        aria-label="Toggle sound"
+        icon={<span>{soundOn ? '🔊' : '🔇'}</span>}
+        onClick={handleToggle}
+        variant="ghost"
+        colorScheme="cyan"
+        size="md"
+      />
+    </Tooltip>
+  )
+} 
\ No newline at end of file
diff --git a/src/store/gameStore.ts b/src/store/gameStore.ts
index 8a92df6..80fc76f 100644
--- a/src/store/gameStore.ts
+++ b/src/store/gameStore.ts
@@ -1,5 +1,6 @@
 import { create } from 'zustand'
 import { persist } from 'zustand/middleware'
+import { playPurchaseSound, playLevelUpSound, playUpgradeSound } from '../utils/soundUtils'
 
 // Building information interface
 export interface BuildingInfo {
@@ -364,7 +365,19 @@ export const useGameStore = create<GameState>()(
       buyBuilding: (buildingType: BuildingType) => {
         const state = get()
         const cost = BUILDING_COSTS[buildingType]
+        
+        // Get building info for level requirement check
+        const info = BUILDING_INFO[buildingType];
+        
+        // Check if player meets level requirement
+        if (state.playerLevel < info.levelRequirement) {
+          return;
+        }
+        
         if (state.points >= cost) {
+          // Play purchase sound
+          playPurchaseSound()
+          
           set((state) => {
             const newCount = state[buildingType] + 1
             const level = state[`${buildingType}Level` as keyof GameState] as number
@@ -383,20 +396,24 @@ export const useGameStore = create<GameState>()(
         }
       },
 
-      buyUpgrade: (upgradeType: UpgradeType) => {
-        const state = get()
+      buyUpgrade: (type: UpgradeType) => {
+        const state = get();
         
-        // Handle upgrade purchase
-        if (upgradeType === 'clickPower') {
-          const cost = calculateClickPowerUpgradeCost(state.clickPowerUpgrades)
+        if (type === 'clickPower') {
+          const cost = get().getClickPowerUpgradeCost();
           
-          if (state.points >= cost) {
-            set((state) => ({
-              points: state.points - cost,
-              clickPower: state.clickPower + 1,
-              clickPowerUpgrades: state.clickPowerUpgrades + 1
-            }))
-          }
+          // Check if we have enough points
+          if (state.points < cost) return;
+          
+          // Apply the upgrade
+          set({
+            points: state.points - cost,
+            clickPower: state.clickPower + 1,
+            clickPowerUpgrades: state.clickPowerUpgrades + 1
+          });
+          
+          // Play upgrade sound instead of purchase sound
+          playUpgradeSound();
         }
       },
 
@@ -411,6 +428,9 @@ export const useGameStore = create<GameState>()(
         const cost = calculateUpgradeCost(buildingType, currentLevel)
         
         if (state.points >= cost && state[buildingType] > 0) {
+          // Play upgrade sound instead of purchase sound
+          playUpgradeSound()
+          
           set((state) => {
             const newLevel = (state[`${buildingType}Level` as keyof GameState] as number) + 1
             const count = state[buildingType]
@@ -444,9 +464,16 @@ export const useGameStore = create<GameState>()(
         }
         
         // Update player level based on points per second
-        const playerLevel = Math.max(1, Math.floor(Math.log10(state.pointsPerSecond) + 1))
-        if (playerLevel !== state.playerLevel) {
-          set({ playerLevel })
+        const currentLevel = state.playerLevel
+        const newLevel = Math.max(1, Math.floor(Math.log10(state.pointsPerSecond) + 1))
+        
+        if (newLevel !== currentLevel) {
+          // If level has increased, play the level up sound
+          if (newLevel > currentLevel) {
+            playLevelUpSound()
+          }
+          
+          set({ playerLevel: newLevel })
         }
       },
 
diff --git a/src/utils/soundUtils.ts b/src/utils/soundUtils.ts
new file mode 100644
index 0000000..de49462
--- /dev/null
+++ b/src/utils/soundUtils.ts
@@ -0,0 +1,192 @@
+// Sound effect file paths
+const SOUND_FILES = {
+  CLICK: ['/click1.mp3', '/click2.mp3', '/click3.mp3'],
+  PURCHASE: '/onPurchase.mp3',
+  LEVEL_UP: '/levelup.mp3',
+  UPGRADE: '/upgrade.mp3'
+};
+
+// AudioManager singleton for handling all game audio
+class AudioManager {
+  private soundEnabled: boolean = true;
+  private audioContext: AudioContext | null = null;
+  private sounds: Map<string, HTMLAudioElement> = new Map();
+  private lastClickIndex: number = -1;
+  private initialized: boolean = false;
+
+  // Volume levels for different sound types
+  private readonly VOLUMES = {
+    CLICK: 0.4,
+    PURCHASE: 0.5,
+    LEVEL_UP: 0.7,
+    UPGRADE: 0.6
+  };
+
+  constructor() {
+    this.preloadSounds();
+  }
+
+  // Initialize audio context - must be called on user interaction
+  public init(): void {
+    console.log('Initializing AudioManager...');
+    
+    if (this.initialized) {
+      console.log('AudioManager already initialized');
+      return;
+    }
+    
+    try {
+      // Create AudioContext if possible (will only work after user interaction)
+      if (window.AudioContext || (window as any).webkitAudioContext) {
+        const AudioContextClass = window.AudioContext || (window as any).webkitAudioContext;
+        this.audioContext = new AudioContextClass();
+      }
+      
+      // Play a silent sound to unlock audio on iOS/Safari
+      const silentSound = new Audio();
+      silentSound.play().catch(e => console.log('Silent sound failed to play:', e));
+      
+      // Mark as initialized
+      this.initialized = true;
+      console.log('AudioManager initialized successfully');
+    } catch (error) {
+      console.error('Failed to initialize AudioManager:', error);
+    }
+  }
+
+  // Preload all sound effects
+  private preloadSounds(): void {
+    try {
+      // Preload click sounds
+      SOUND_FILES.CLICK.forEach((path, index) => {
+        const audio = new Audio(path);
+        this.sounds.set(`click_${index}`, audio);
+        audio.load(); // Begin loading
+      });
+      
+      // Preload level up sound
+      const levelUpAudio = new Audio(SOUND_FILES.LEVEL_UP);
+      this.sounds.set('level_up', levelUpAudio);
+      levelUpAudio.load();
+      
+      // Preload purchase sound
+      const purchaseAudio = new Audio(SOUND_FILES.PURCHASE);
+      this.sounds.set('purchase', purchaseAudio);
+      purchaseAudio.load();
+      
+      // Preload upgrade sound
+      const upgradeAudio = new Audio(SOUND_FILES.UPGRADE);
+      this.sounds.set('upgrade', upgradeAudio);
+      upgradeAudio.load();
+      
+      console.log("All sounds preloaded");
+    } catch (error) {
+      console.error("Error preloading sounds:", error);
+    }
+  }
+
+  // Play a specific sound file
+  private playSound(key: string, volume: number): void {
+    if (!this.soundEnabled) {
+      console.log('Sound is disabled, not playing', key);
+      return;
+    }
+    
+    // Try to initialize audio if not already done
+    if (!this.initialized) {
+      this.init();
+    }
+    
+    try {
+      const sound = this.sounds.get(key);
+      
+      if (sound) {
+        console.log(`Playing sound: ${key}`);
+        
+        // Clone the audio to allow overlapping sounds
+        const clonedSound = sound.cloneNode() as HTMLAudioElement;
+        clonedSound.volume = volume;
+        
+        clonedSound.play().catch(error => {
+          console.error(`Error playing sound ${key}:`, error);
+          
+          // If the first attempt failed due to interaction policy, 
+          // try again after a slight delay
+          if (error.name === 'NotAllowedError') {
+            console.log('Attempting to play after delay due to browser restrictions');
+            setTimeout(() => {
+              const retrySound = new Audio(sound.src);
+              retrySound.volume = volume;
+              retrySound.play().catch(e => console.error('Retry failed:', e));
+            }, 100);
+          }
+        });
+      } else {
+        console.warn(`Sound not found: ${key}`);
+      }
+    } catch (error) {
+      console.error(`Error playing sound ${key}:`, error);
+    }
+  }
+
+  // Play a random click sound
+  public playClickSound(): void {
+    console.log('Playing click sound...');
+    
+    // Get a random index that's different from the last one
+    let index;
+    do {
+      index = Math.floor(Math.random() * SOUND_FILES.CLICK.length);
+    } while (index === this.lastClickIndex && SOUND_FILES.CLICK.length > 1);
+    
+    this.lastClickIndex = index;
+    this.playSound(`click_${index}`, this.VOLUMES.CLICK);
+  }
+
+  // Play the purchase sound
+  public playPurchaseSound(): void {
+    console.log('Playing purchase sound...');
+    this.playSound('purchase', this.VOLUMES.PURCHASE);
+  }
+
+  // Play the level up sound
+  public playLevelUpSound(): void {
+    console.log('Playing level up sound...');
+    this.playSound('level_up', this.VOLUMES.LEVEL_UP);
+  }
+
+  // Play the upgrade sound
+  public playUpgradeSound(): void {
+    console.log('Playing upgrade sound...');
+    this.playSound('upgrade', this.VOLUMES.UPGRADE);
+  }
+
+  // Toggle sound on/off
+  public toggleSound(state?: boolean): boolean {
+    if (typeof state === 'boolean') {
+      this.soundEnabled = state;
+    } else {
+      this.soundEnabled = !this.soundEnabled;
+    }
+    
+    console.log(`Sound is now ${this.soundEnabled ? 'enabled' : 'disabled'}`);
+    return this.soundEnabled;
+  }
+
+  // Check if sound is enabled
+  public isSoundEnabled(): boolean {
+    return this.soundEnabled;
+  }
+}
+
+// Create a singleton instance
+const audioManager = new AudioManager();
+
+// Export the functions to use throughout the application
+export const initAudio = () => audioManager.init();
+export const playClickSound = () => audioManager.playClickSound();
+export const playPurchaseSound = () => audioManager.playPurchaseSound();
+export const playLevelUpSound = () => audioManager.playLevelUpSound();
+export const playUpgradeSound = () => audioManager.playUpgradeSound();
+export const toggleSound = (state?: boolean) => audioManager.toggleSound(state);
+export const isSoundEnabled = () => audioManager.isSoundEnabled(); 
\ No newline at end of file