Typing Game

Hello Everyone,

I am interested in creating a course to help develop typing skills. I wanted to create one based on an underwater scene where a shark is based on one side of the screen and as you type (a word that drops down from the top of the screen) correctly, then shark will not move but if you type one incorrectly the shark moves towards your character on the left. I am fairly proficient with Articulate and creating triggers, but I admit that I am looking for ideas on this one. Thank you all in advance. I have not started this yet and I am looking for ideas and suggestions for this undertaking. Thank you again. 

Side note: I understand the lengths at which the work will involve and am prepared to log hours!