Mega thank you for streaming it. There is a lot of valuable information there!
Balancing a game is hard. If that game is in a "skill game" it is even harder. If you also make it a Tower Defense, it is really really hard. I only found a sweet point 2h before submitting.
I have not seen a TD + typing either, from my point of view it is an "original idea". But I am sure someone tried before.
I have in mind whether I should give it a fair try and make a comercial version. Many things to try and test though.
Thanks for playing!