It is Scrabble, plus two things.

1. Switch a letter. Instead of playing a word, tap a tile the bot played, then tap a letter from your rack. If the swap makes a new word, the word is yours and you score all of it. You can change the first, middle or last letter. You cannot switch your own tiles, and the bots can switch yours right back.

2. Spot the hidden words. Play PLANET and there are words hiding in it: PLAN, LANE, NET. The game will tell you they are in there, but you only score the ones you can name. Miss them and they are gone.

Hidden words must be 3 letters or longer and sit in one unbroken run inside the word you played.

Whose tile is whose. Your tiles are blue, the bot's are cream. You can only switch cream ones.