Fun stuff. The tower defense is manageable enough, even if you somehow goof up every guess (provided you get the gems). Only issue I ran into is that the big headed medal didn't unlock even though I got the word right the second turn, both in the daily challenge and practice mode and only have the twitter post to show for it.
Edit: Ok, I got it on the second turn again and I'm pretty sure it's something with the api, maybe the browser which wouldn't make much sense since the other medals unlocked just fine. Strange.