Checkout this First-person health and safety mini-game I developed within a few weeks.
Sorry its only accessible via logging-in to Facebook, but an Android version is planned.
Yes, its Flash-Unity3D. As its Facebook, and only a mini-game, the client insisted that it be released in Flash. There were some initial problems making it work well (I had to downgrade Unity, optimise meshes, limit effects, etc) in Flash + Facebook, etc. But we got there in the end, and the client and myself are pleased with the results.