It’s a good example of a game, that adds an option for colorblinds - naming the colors with letters!
I remember my friend playing this game on a 2 minute game mode - how many levels can you pass by 2 minutes?
Her record was 20 levels. She gave the game to me and I had a hard time, then, I told her, “wait a minute, show me the settings please”, then I’ve found the letters option and the game became so much easier, I got the record to 25 :P
even my friend found it easier that way. I explained her than even though she see colors perfectly fine, she still use time(even if it’s a small amount) to distinguish a color from another, where the letters saves that time.