It's a bookmarklet on the Line Rider game which adds stock market charts in the background., so you can turn the banking crisis into a game. Obviously it's meant as a little bit of a joke, I thought that this should exist, and it's fun because it only works on stocks that are going down. You can easily choose Silicon Valley Bank, Credit Suisse an whatever bank is going to crash next week etc. There are two videos on the homepage that show how to use it.