Any game that is fun even for 5-10 minutes will ripple through people for years, there is always a new 10,000. Also they are very good at viral marketing. The

Any game that is fun even for 5-10 minutes will ripple through people for years, there is always a new 10,000. Also they are very good at viral marketing. They have you commenting on the game in a thread on HN about it. Keep people talking about your game and what you are doing, recipe for success. The game mechanic is catchy, that is almost all a successful game needs aside from marketing momentum.