Super fun idea! I enjoyed the simple but compelling storyline and interesting scrabble hook. A few bits of feedback for improvement...
In my opinion it wouldn't have hurt to take just a few more lines of tutorial to explain specifically how to input words, especially since you have to drag and drop them in, and in reverse order lots of times. I would have been fine with a little more hands-on tutorial, at least for the first word. Maybe make the first set of letters something that is the same no matter what and let the characters specifically mention a correct word to input?
It also wasn't immediately clear that my goal was to connect the initial word to the various interaction points. Again, just spitballing here but perhaps if there was one prior level where the first word was given and there was only one possible interaction point available would have helped ease me into that more.
Finally, and I know this is nitpicky, but I think some kind of indicator above whichever character is speaking could have helped me know who was who more explicitly. Just a thought.
Oh, and on the finish screen where it says "Press esc" I did so but nothing happened...
Thanks for the fun game though! Overall a lot of great ideas executed very well. Cheers!