I updated the app I put together last year for the 2017-18 season for anyone who's interested. It grabs data from the hockey reference schedules and results, creates the snakes, and auto updates each day based on the games played. It has snakes for each team and you can go back to 2014-15, but by default only the current and last year are shown.
I also added in a new feature that has standings based on how many points each team is above or below the snake.
Hope you like and if you have ideas for features, always interested to hear!
http://bit.ly/playoff-snake-2018