If, like me, you entered the game and found yourself not fully understanding how to play (because you didn't read the example), then found you couldn't play the game again today, just delete the cookie it leaves in your browser of `has_played - 1`. Then you can play again.
Seems a weird choice to only let people play once when it could be easily randomized or solved in multiple ways, unlike Wordle, which seems to have started the one-a-day fad.