Did my Mincraft crashed? Or is it my gadget I need to repair?

So I have this 20+ mb world in Minecraft, then it started lagging. I restarted my tablet several times but to no avail. I updated it to the latest and the condition got worst. Everyhing is blue and I can't do anything but walk. Is there something wrong with the PE version? Or ia it my tablet I should repair?

It's a tablet, of course it can't handle large worlds…