Hi again. Thanks for playing and for the advice.
About the inventory limit: yes, that's on purpose... because you're a skeleton! No backpack, no pockets, and just two fragile hands to carry things. In fact, there are many objects in the game and one of the "puzzles" is to figure out which ones are useful and which ones are not.
The dog is not really dangerous -in fact, you can even pet it!-, it's there just to block the path. Thanks for the code suggestion, but I don't want to put "menacing" things in the game, the only scary thing is being a skeleton :)
To advance, you need to use something in a room you haven't discovered yet. There's no key to enter that room, you have to do something in the hall.
And I've just uploaded a new version of the game with the Monty Python image removed. The joke is almost the same.