Problems after iOS 7.1.2 on Ipod Touch 5th Gen

Question

At about 3 hours ago my Ipod Touch 5th Gen turned off on me. It came back on itself, so I accessed the lock screen correctly put my password in and thats where my problems started.
I put in the correct password it accepted it.
The screen then changed to my background screen colour.
Very quickly the screen went black and the apple logo came on (as if it was turning on)
I repeated the process again and I can not access my home screen or any of the apps. It repeats itself.
I've had all my apps crash on me ever since I downloaded the iOS 7.1.2 update.
On the lock screen I can still access the flash light and both cameras?
What I have tried:
Turning it on and off.
Charging it.
Plugging it into iTunes.
Reset where I hold the lock and home button.
Nothing works.
Its a 32gb Ipod touch 5th gen with about 6gb of storaged unused.
I haven't dropped it or done anything unusual.
At the time it crashed I was playing on Farmville 2 app. This app crashes alot could it have something to do with it?
Please someone help me, I've googled it and can't find any problem like mine on here!
I've only had it 7 months.
Thanks,
Nadia

Answer 1

Then do this:
Placing your device into recovery (DFU-Device Firmware Upgrade) mode:
Follow these steps to place your iOS device into recovery mode. If your iOS device is already in recovery mode, you can proceed immediately to step 6.
   1. Disconnect the USB cable from the iPhone, iPad, or iPod touch, but leave the
       other end of the cable connected to your computer's USB port.
   2. Turn off the device: Press and hold the Sleep/Wake button for a few seconds
       until the red slider appears, then slide the slider. Wait for the device to turn off.
              * If you cannot turn off the device using the slider, press and hold the
                Sleep/Wake and Home buttons at the same time. When the device turns off,
                release the Sleep/Wake and Home buttons.
  3. While pressing and holding the Home button, reconnect the USB cable to the
       device. The device should turn on. Note: If you see the battery charge warning,
       let the device charge for at least ten minutes to ensure that the battery has some
       charge, and then start with step 2 again.
  4. Continue holding the Home button until you see the "Connect to iTunes" screen.
       When this screen appears you can release the Home button:
  5. If necessary, open iTunes. You should see the following "recovery mode" alert:
  6. Use iTunes to restore the device.
If you don't see the "Connect to iTunes" screen, try these steps again. If you see the "Connect to iTunes" screen but the device does not appear in iTunes, see this article and its related links.
Additional Information:
If you have a problem getting into recovery mode then try: RecBoot: Easy Way to Put iPhone into Recovery Mode.
Note: When using recovery mode, you can only restore the device. All user content on the device will be erased, but if you had previously synced with iTunes on this computer, you can restore from a previous backup. See this article for more information.