If you want to improve your typing speed to the master level, then you should try Typer Shark game which allows you to make use of your keyboard to find the lost treasure. You have to play the role of a diver who faces different sharks in his journey to get the treasure from under the ocean.
You have to type one word or two words to repel the sharks. The graphics look really well, and the gameplay is enjoyable. You also have to install RealArcade to play this one which takes a slightly more extended period of time, but after you install it, you can play this game right away.
Typer Shark increases speed and accuracy while electrocuting sharks. If you need help, you can use the Typing Tutor. This game is going to be a delightful challenge for you, and the full version of this one enables you to improve your skills.
You can also try out the difficulty setting that matches your typing ability. You also have to face Boss Monsters which you have to defeat while playing through this game.
Typer Shark also offers you the ability to record high scores and to track typing stats. It is pretty easy to understand how this game works.