Hi there penutki73,
Welcome to Apple Support Communities.
If I understand correctly, there's an issue quitting an app on your iPod touch because the Home button isn't working on your iPod touch. Try restarting the device or setting up service for it, as suggested in the article below.
Get help with buttons and switches on your iPhone, iPad, or iPod touch - Apple Support
The Home button is on the front of your iOS device, at the bottom. If the Home button doesn't work, follow these steps:
- Press the Sleep/Wake button to lock your device.
- Wait a couple of seconds.
- Press the Home button. Your device should wake up.
If your device doesn't wake up, follow these steps. Test the Home button after each step:
- Restart your device.
- Check for debris or dirt around the Home button and clean it with a soft cloth.
- Remove any protective film or case that covers the Home button.
If the Home button still doesn't wake the device, or if the button is damaged, contact Apple Support.
Cheers.