Here's a whole playground of chrome experiments. It's certainly a good way to waste away the hours.
You'll find all sort of fun and fascinating things here:
Nice, but far too distracting , Just spent an hour looking through and have only scratched the surface. There are probably good ideas for apps if your looking.
Yes, I know that feeling. Like a kid in sweet shop. There a few 'game' experiments there. You can find them by clicking the tag in the top left corner which allows you to filter categories.