While trolling through the archives at The Thinking Blog , I came across This post.
It is about a typing game that tests your accuracy and speed. Either you type the words quickly (and correctly) or the enemy tanks will shoot you. There are even bonus words such as fullhealth and detonate.
I decided to head over and take a peek ended up playing for over 45 minutes! I have to admit that I would have enjoyed keyboarding in high school much more had we done this!