Cute little game! I like the combination of tower defense with word/typing mechanics: that alone is already nice enough to keep my interest, but when you combine it with special abilities and diverse enemy variety and so on, it gets really complex in an interesting way! It's like, the game could've just been about always typing the biggest words, but when you factor in innocent chickens that you want to avoid, or maybe enemies that split, there's actually a lot of strategy involved in what is truly optimal beyond just the biggest words (but then you also need to factor in the bonus for using all letters: maybe its worth sacrificing a chicken for that!) Game is also just very juicy and charming with its general presentation too: well done!
I will admit, though, that parts of the game had me really confused. For example, there were plenty of times where the game allowed me to fire when the word I typed was seemingly gibberish. I'm giving you the benefit of the doubt that they were technically real words that I was typing, just unbeknownst to me, but still, weird stuff.
There's also the fact that I found it quite weird that there is no time limit: instead of the enemies coming down over time, they freeze in place until you make your move. Call me an armchair developer if you like, but I feel like this compromises the scoring system, since without any pressure, it just becomes a game of patience where anyone could take all the time in the world to make the most optimal choices, instead of being a game about skill, reactivity and improvisation. Maybe it was an intentional choice to make a more relaxed game, I guess (though if that were the case, you'd think that hurting chickens would only deprive you of an opporunity to get health, not immediately hurt you as well).