This is the classic Memory game.
It was my first (and last) game I have build with Power Apps (it was called PowerApps back then 😉).
How to play is quit simple:
When all pictures are shown, you get a "You did it!" message. A counter is kept to record the amount of clicks needed to show all images.
You can start a new game by clicking on "New" or start another one by going to the home screen.
The images are hosted on the website: http://icons.iconarchive.com/
The original app I created used a SharePoint list. I changed this to imported data from Excel.
Have fun!
Rick