Shadowy Den is actually quite fun. The skull on the death screen scared me at least once. I would love it if there was a sound effect when the character dies, and a pause before transitioning to the death screen. The control scheme greatly upset me at first, but I got used to it and made it through some of the rooms in the aforementioned Shadowy Den. I was surprised by how many rooms / levels there are! It was a lot of fun to manage my energy level while climbing walls and swimming through rivers. I was much more worried about my energy than HP. And yeah, the controls screen showing a block of 9 keys scared me worse than skull did, but I like how it's different and cool.