The Risky Steps game is reskinned and updated with the full source code available.
Emanuele Feronato has published an updated tutorial for his game Risky Steps: "It all started with a Circle Path prototype, then I made a simple game called Risky Steps to be included into a FREE UPDATE with my book Create HTML5 vertical endless runner cross platform games, so while I am about to release an update of the book, here’s a reskinned, more elegant version of the game:"