Creating Pairs game with Weblfow

Hi all,
My daughter really likes to create animals dulls from run-out toilette paper. She also really likes to play memory game (also known as Concentration, Match Match, Match Up, Memory, Pelmanism, Shinkei-suijaku, Pexeso).
I managed to build the basics. But I couldn’t find a way to make two similar cards disappear once they are found without writing code. Any ideas? If someone has a simple java-script to solve that, I’ll be happy to accept.
Thank you!
Here is my public share link:

Hi Asaf,
It looks very cool, I’m working on something similar as a hobby project and wanted to ask if you maybe would be so kind to share/sell it as a template?
Thank you!