Well i see you put plenty of effort into it, and i don't want to be rude but i think you're making too big steps. Although i might be wrong but i think its not much of a practise if you just put the kana alphabet in front of someone and tell them to decipher a given text with it. Well i suppose i might be wrong once more, as i don't know how in-depth was the guide intended to be, but still i think its not gonna work if you just tell people in the end of lesson 1 that they should now learn kana and continue the lessons with in kana. Although as i said i don't know how in-depth the lessons are, if you wish people to use other guides and books apart from yours than i think its good job, if not... i think you should stick to romaji for a bit longer and teach kana step-by-step. Correct me if im wrong.
I for one am using Jimmy Seal's guide, and i must say he surely put a lot of effort into it, and even his guide suggest that one should use other material beside the guide. I don't know if you are familiar with that guide, if not i will find you a link, as i have the guides downloaded. But yeah, it would be amazing if you could make a guide like that. Just keep on working.