I just want to make it clear that I DO NOT think that TND is a waste of anyone's time and I DO NOT think that you should stop making games. That is the furthest thing from the truth of my intentions. Improvement in anything, including a second language, comes from critique, evaluation, and practice -- as I'm sure you know. I was trying to give feedback, as a fluent native English speaker and a fellow writer, in an attempt to provide help in that process.
There's no need to defend yourself from me; I think quite highly of you both for making a game, and in a non-native language. That's very impressive!