I'd like some indication that a word was invalid, say, if the tiles comprising that word were faded, so I wouldn't have to keep looking words up before every other move. Either that, or have a top level button for the dictionary, and when it opens list all the valid words currently in play so you can see at a glance if your opponent's word will be hazardous.

I also agree with the other comment that said knowing the outcome of your potential move would be helpful. Maybe even a training mode where every time you're about to self-own, the game displays a question mark and gives you a chance to retract the move.

The only other thing is, and I don't know how much it would impact gameplay, but having two-letter words count as valid seems like a cheat somehow because of all the sketchy ones like "oi" and "er." I wish the game could be configured to only accept 3+ letter words.

Overall, gameplay was interesting, but as it stands, not addictive.