Adaption of flappybird controllable by HaloCode (optional). To start the game in browser just hit the green flag and press space to start/jump For playing with HaloCode read the instructions below. There are tons of Flappy Bird adaptions around here but no one i've played so far used real game physics. What i mean with this term is the calculation of movement over time which is used in actual games too. This makes the gameplay much smoother. If you think it's too easy.. just open the source code click on the bird in "sprites" and increase the "gameSpeed" variable.