This is a webapp that touches on a number of different Apps Script capabilities such as..

What does it do ?

Using data derived from mostly all the Jeopardy questions ever, served up by the ExecutionAPI  using the bigquery json api, this keeps player data in Firebase, and uses the People JSON API to identify the player’s details. Questions are served up based on selected categories, and players scores are updated depending on whether they answer a question in time. 
Try the App here.
I found the data here, on reddit.

A screenshot

If you want to try it, here’s the link. I’ll be writing up each of the components if you would like to see how to do this kind of app yourself.