It is Word Bubbles at Lumosity.com
A few months ago, my goal was 2000 points. Then it went up to 2500 points. Three days ago, I scored 3090 points, my first time over 3000. Today I played again and scored 3060. 3000 is my new goal (!) but I'm not likely to reach it often. There's a lot of luck involved with the three letters that are presented but it's fun.
It is supposed to be a game to improve "verbal fluency." We'll see.
There are other fun free games at this site, too, but I like Word Bubbles best. If you want to check it out, know that you do not have to create an account to play several of the games. Whenever the create account window opens I just close it again and I'm good to go.