LastFm Stocks

This was a kind of "game" I made in 2012 where you could buy and sell stocks like with the stock market but with the popularity of musical artists instead of companies.
I was using last.fm listening stats to vary prices over time.

Unfortunately my api key is cuyrrently broken so I can't even take a proper screenshot of how it used to look when it was working, but it was pretty.

I can only show the layout as a picture :

Also here is the php source