Update to flip card game

When I was coding my timer for my project, I found it extremely difficult to code the game with the timer. Because of this I've decided to implement a different tutorial for the game. This tutorial includes a timer and allows the user to see their score, wins and losses once the game is complete. Also this game allows the user to pick different levels of difficulty. In my opinion I believe this game is more beneficial to my web application as it provides more options for my users.

Tutorial: https://codepen.io/zerospree/pen/bNWbvW