Hey Rodrigo, was playing your map and I find the text that everyone is typing to be very distracting. The amount of text ends up being too much and we really don't need to see so much of it. I think that if you were to decrease the time the text (chat messages) lasts on screen to like 1 or 2 seconds, that would clear the screen up quite a bit. Alternatively, if you are unable to do that, you could just instantly cause chat messages to be cleared as soon as they are type, and have them appear in a dialog (that can be hidden). That way people who want to be able to see the chat messages are able to, and those who do not can also hide them.
Also, I think your scoring of "Total words typed" is a bit unfair. Players who type mostly 3 letter words would probably end up with more words than those typing out the big long words. You should be able to keep track of how many "characters" each player types. Assuming you keep track of how big the words are that a player successfully types. Then just add up the number of characters and there you go. This could be a "second score" if you don't want to remove the total words. Or you could turn it into something like "Average word length" that the players typed, etc.