This is an iPhone/iPod touch game which simulates trading on the stock market. It is now available on the iTunes store: View in App Store
You can read about it on http://tgwena.blogspot.com and http://quantlua.com
You have several companies to buy stock in. There are also bonds which occasionally pop up. Here is a Youtube video of the program:
Pricing a vanilla option:
This program is powered by QuantLib and Lua.
Here is video of the Lua backed slightly exposed.
Other investment opportunities are equity derivatives and interest rate derivatives.
For more information email here