$15K with expenses. Development time was around 400 hours on a 6 months period. I'm not sure about "marketing time" though (making trailer, descriptions and icons for the game, e-mailing and negotiating with sponsors). That might have played around 50 hours on a 2 months period. I worked alone on the project except for the commissioned music. In the end, it made me a pretty good salary for the time invested. I consider it a success. As for successful Flash games, you might want to take a look at the numbers behind SteamBird. That's probably THE most talked about Flash game in the business at the moment.