Virtual/Bird is my entry to the Flappy Jam. Use the flap key to avoid pipes. It's probably too hard, but I guess that's okay. I got to level two once, but there are four of them (and they repeat forever if you beat level four somehow). I am pretty sure the last two are impossible though so I don't expect that to ever happen.
The game should work in Chrome, Firefox and Safari. IE11 doesn't seem to work, so sorry if you love IE.