https://fatihyildiz-cs.github.io/simon/
In this game, you have to mimic the random colors/sounds in order. At each level, there is a new color added to the sequence. There might be latency in mobile and desktop safari visits:
Example:
Game Starts: Red
You have to press: Red
Game Advances: Blue
You have to press: Red - Blue
Game Advances: Green
You have to press: Red - Blue - Green
and so forth. I hope you have fun.