Try first quitting all your games and then doing a reset.
To quit apps: double click on the home button to get to preview mode. You will see a row of preview screen for each app that is open, with the apps icon underneath it. Swipe upward from the preview screen (NOT the icon) off the top of the iPad. Make sure there is no left-right movement of the preview screen while swiping upward. When you are down to just the preview of your home screen you are done.
To reset your iPad: hold both the power and home keys down together for at least 10 seconds until the apple logo appears. Let go promptly when the logo does appear. Wait another 30 seconds for you iPad to restart. No data will be affected.
Now try your apps. It the time and battery percentage still appear then I suspect it is an app problem.