Good take on an old joke
The "Link can't speak" jokes, while technically not true, and nevertheless done countless times, and they're usually pretty funny. This is no exception.
The art style is great. It's well drawn, and smooth. There is detail in the backgrounds and in the characters. Good.
The voices are clear, and the shopkeeper is able to express emotions and inflection effectively. That was you, right? Good job.
My one problem with the movie isn't a technical aspect, but a story one. I've never seen Link as violent like in the end; he always seems to be portrayed as a selfless, compassionate and humble hero. That's my interpretation of him, though, and not yours. Perhaps this is why Miyamoto has kept Link from speaking; so we all can imagine Link as we wish.
Good job, therefore, on doing what Miyamoto wants us to do.