Rock Paper Scissors Lizard Spock, Vanilla JS/HTML/CSS, animated

I learned a lot about Javscript on this one! Which is good, cause that was my entire goal for this project. I watched some videos and looked at some other projects on codepen to see other peoples approach, then smashed things together until it worked right!

I think I did a pretty good job actually, like the switch where I define almost the entire game logic in "gameFunction(userChoice)", but I'm always open to advice/criticisms. Do you see somewhere my javascript could have been more efficient?