Android app don't run on the device or emulator?

This is my manifest file my issue is. Apk installed on the device but I don't see it in the apps it don't lunches as it spouse to be. i bought this project and the gave 79 dollars to the guy who sold me but when i tried to contact him he is out of reach.

   <?xml version="1.0" encoding="utf-8"?>
   <manifest xmlns:android="http://ift.tt/nIICcg"
  package="com.electricpunch.wallpaper"
  android:versionCode="1"
  android:versionName="1" 
  android:installLocation="preferExternal">

  <uses-sdk android:minSdkVersion="7" />
  <uses-feature android:name="android.software.live_wallpaper" />    
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission   android:name="android.permission.ACCESS_NETWORK_STATE" />
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

  <application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >

    <service
        android:name="com.electricpunch.wallpaper.PlanetWallpaper"
        android:label="@string/app_name"
        android:permission="android.permission.BIND_WALLPAPER" >
        <intent-filter>
                                                                    <action                                                                               android:name="android.service.wallpaper.WallpaperService" />
        </intent-filter>
        <meta-data
            android:name="android.service.wallpaper"
            android:resource="@xml/wallpaper" />
    </service>           
    <activity
        android:label="@string/settings"
        android:name="com.electricpunch.wallpaper.PlanetSettings"
        android:exported="true"
       >
    </activity>
      <!-- Ads Using Google Play Services SDK -->
    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />

    <activity
        android:name="com.google.android.gms.ads.AdActivity"
                android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|u     iMode|screenSize|smallestScreenSize" />
</application>

</manifest>