The sounds played when typing letters are a bit random. I'm guessing they depend on which letters they are, but it would have been fun to be playing music with them. I think I once typed a wrong letter simply because I saw the start of a word and didn't wait to see the end and just guessed, and I can see someone else was having trouble keeping up... Perhaps there could be options for different speeds, or the new letters could show up slightly faster or slower depending on how many untyped characters were already on screen (unless you already have such a system in place and it's just very subtle).
I'm not sure what it would have been like if there were a lot more levels, but when playing games to rate them, it's nice when they're short, so I can get to try more of them. And for the short time it took me to beat it, this one was pretty fun. One nitpick that's probably not gonna affect the score I give the game, but I might as well mention it, I prefer that games show text on screen if they have voice acting, I had turned the audio in my headphones a bit down when playing another game, and quickly had to turn it up to hear what the wizard was saying. Showing the text on screen probably wouldn't have been hard, but I guess you weren't thinking of Beethoven when you made those cutscenes.