Hello!
It's been some time I have been thinking of developing a typing game. Originally I had in mind a full featured game (with educational purposes), but I assume you want to build something smaller and more immediate. That would be great for me, since I could use this project as a mean to prototype what I have already been planning for my game.
This kind of game could be easily developed with web languages (HTML5, javascript, ecc...) and implemented in a website. Later it can also be ported as a mobile app.
You have to keep in mind that if you want it to meet its purpose, we'd need to use some kind of database to pull the words from... This can be done via PHP/MYSQL or even better by finding a proper API.
I have been working with the aforementioned technologies for some time now. I am building my skills as I go. I am new to freelancer and trying to get some rep, this is why I wouldn't ask for much cash for this project, but, since I am really interested in developing this type of game, I can grant I would put a lot of passion and effort into it.
If you're interested in any way in collaborating with me, kindly contact me, then we can start talking some specifics...
Thanks for your attention!
Regards,
Bagongo