MEMORY

I've tried your game and it is indeed a nice implementation!

If will try to give you two small suggestions to make it imho nicer:

• Use also a small icon in addition to card colors (it will make memorization process easier / more fun)
• Implement a timer that will auto-cover the cards if the match failed.

I've found a nice / easy / well done timer API here:
https://www.lexaloffle.com/bbs/?tid=3202

Thanks for sharing your game and happy hacking :)