Some more feedback after trying to play the game again in a mode where I'd at least be certain of the outcome of my own moves:

- Opening the dictionary lookup requires two clicks, and then a third to focus the text entry. It needs a hotkey, and must focus the text entry no matter how it was opened.

- I'd expect to be able to dismiss the dictionary lookup page with Esc, but it requires yet one click.

- The dictionary lookup covers up parts of the board, and makes the visible parts hard to read. This makes looking up multiple words in one go pretty inconvenient.