[Adorapuff]

Prerequisites:
Jailbreak
iFile
Flappy Birds

Open iFile and click the settings icon in the bottom left. Then click file manager and make sure "Application Names" are turned on.

Click done then navigate to /var/mobile/Applications

Go into the Flappy Bird folder and click on Flap.app

Click atlas.txt, and in the top left click edit. Scroll down until you see pipe_down. Change the second value in pipe_down from 52 to 0 and 270 to -300.

Now close Flappy Birds, reopen it, and play like usual except now the top pipe will not be visible not hittable.