Thanks for playing the game, and for the feedback!
Fun thing about the keyboard, X already works as Escape and Z works as the Enter key. I will update the documentation so people know this.
There will be a way to lose to lower level demons in the following chapter. It's just not in the current public build.
I'm still debating over adding a monster menu, because the idea is that this is what the training room is for.
If enough people ask for this feature I will see how can I implement it.
Once again, thanks a lot for playing and for the feedback.