In the Kentucky Derby Hats game, the sound effects do not always work with what happens. The match found sound doesn't always play when you find a matching pair and the flip sound doesn't always play when you flip.

Also, the volume slider doesn't work a lot of the time. I personally find the sfx distracting and always mute it but I have to turn off my device volume as despite muting on the slider, the sfx will still play.

I forgot to add, this only has happened to me on iOS (phone and ipad), not on my computer (Windows).