Wordle challenges people to find a five-letter word in six guesses, with a new puzzle published every day.
It has amassed a following of 300,000 people in three months.
But creator Josh Wardle told the BBC Radio 4's Today programme that he never intended for it to go viral and wants to maintain its simplicity.
The game is available online through a free website - but does not have a smartphone app.
"I am a bit suspicious of mobile apps that demand your attention and send you push notifications to get more of your attention," he said.