Thanks for the feedback! Appreciated
The boss is a little bit tricky, we didn't want to explain the full mechanic, but was indeed needed I think.
Anyway, the boss is divided in three phases, with a special attack in between ( when he throws the word attack ), you have to "parry" the attack by pressing E at the right time to damage him.
The boss encounter is also random (roughly 70/30), so not all the letters delivered should trigger the boss fight.
Hope it helps!
Thanks again, we'll try your game as well as soon as we have time!