Ahhhh I love playing a game that remind me of my own insomnia! I loved the fact that I needed to undersand what I should avoid and what I shouldn't to be able to keep counting down faster. And having a second night where every nightmare can go simultaneousely is a good plus!
I would love to have more subtilities of a same nightmare, for example in a possible harder level, having nightmare with four, five and seven cough precisely. it would make the game even more interesting because of the fact that you have to remind and think about more things, precisely the fact that keep us awake at night xD
Good work!