You play by using the mouse to go from side to side (or press SPACE to Lock the mouse, and unlock the pointers keys), and try not to hit the pipes! Turn the sound off with N, and on again with M.
Big shoutout to Houchdj for making the original FlappyBird Online! He is an amazing Scratcher and this project wouldn't be possible if he hadn't made FlappyBird Online in the first place! :) I I I I \ / \ / \/