Heh. That was fun. I got my start with text based games like that, but never really thought other people were making them.
Challenging to figure out. I found it a little difficult to connect up the descriptive text with possible commands. I was really struggling and bumbling about to get anywhere. Thankfully you included a help section I managed to stumble into.
I got stuck in the cave on my first try. None of the commands I typed would do anything. I couldn't leave the cave. I couldn't look around. I couldn't explore further. Not sure what happened, but it felt like I'd entered some void in the game from which I could not escape. I even tried viewing the source to the page, looked through your JavaScript code, and tried a bunch of the commands listed in there for the cave. None of them were working for me.