Enjoyed both this and the other Wordsum game, but preferred this one for its continuity and interface.
I found it difficult to manually confirm or clear a word; I'd prefer it confirmed/cleared as soon as I let go OR binding keys to those functions (such as space to confirm, F to erase, G for next row).
(If I were to implement a keyboard-only play, I would have a player type a word and then when it is confirmed, search the board for whether the combination exists (using the first combo it finds).) (In an ideal world, the current implementation, my preferred implementations, and the keyboard only one would all be options available to the player.)
Another difficulty: when making a 4+ letter word, the notification that pops up overlays the top lines, hiding the contents of the letters beneath, which made it difficult to find my next word in many cases. Shifting the notification to the side or to the top would fix that.
Despite my quibbles, I will certainly continue to play. Thanks for the game!