- make it possible to play with W key and up arrow key (or even with a right-click).
- forget R key for restarting, @Wired Pixels has it right. let the player use a single button for the whole game.
- optional: modify the transition to the flappy bird mode by making a automatic little jump in the start, giving the player time to adapt. otherwise, unprepared, he can lose right away.
it's enjoyable, and i like the idea.