Apparently, I'm an idiot. I can't figure out how to play, and I don't see instructions anywhere (not even google helped). When I enter letters, the letters are entered in both words. If the words are different, how can I guess two different words if the same word types twice when I enter the letters?
Edit:
Ok, I just figured it out. On the "community" page (which is where this question ended up) I saw a picture of a completed Dordle (I hadn't seen one before). Your letters fill in both words until you have completed one word. After one word is completed, when you enter letters, they no longer fill in the completed word; they are only entered in the uncompleted word. So then you can finish guessing the other word.