Even if it is just a remake of Helicopter, Flappy Bird still seemed to win the hearts of millions of smart phone users. The app developer pulled it, citing fears of addiction to the game (a bigger man than I, given the money the app was pulling in). Enterprising Redbubble artist OMGitsSussy then jumped in with this R.I.P Flappy Bird t-shirt.
You can grab the shirt for $24.95 at the Redbubble store. As with all the Redbubble designs, you can customize the color and t-shirt.