Originally designed to be a sample game for a tutorial on my blog, this game grew beyond it's bounds. I have yet to finish the tutorial but the game is in a state that can be played reasonably and that works for this contest. It's not a canabalt clone but it does use HaXe and Flixel!
When the tutorial is finished you can read it at williamthompsonj.blogspot.de
Forgot to mention the source can be found here: https://github.com/williamthompsonj/HaXeRunner