The bigflake samples were written as CTS tests, to be executed in the test harness (though some of them never actually turned into tests). If you're not set up with a full source tree it can be difficult to get them to work unmodified.
For a complete app example, see Grafika. The examples are a bit more involved, but you can get the code running more easily. In particular, "Continuous capture" and "Show + capture camera" will be of interest.