It is recommended that you play the game with pencil and paper.
Write down any hints that seem important.
Books marked with a cross contain important information that you should be sure
to write down and remember.
Books marked with a paw print never have useful information in them.
There is only one key in the game.
You need the key to read books.
If you use it on a door, it is gone forever.
If you touch a flying keyhole, it will steal the key from you.
When this happens, you can press the warp button (default W) to warp back to the
start and get it again.
You only get one chance to pick an exit door.
You should be as sure as possible before picking an exit door.
There is only one exit door.
Before picking a door, you should solve the riddle of the four brothers.
Figure out which door each brother went through.
If you can figure out which of the four brothers escaped, then you know that
door is the exit.
There are two books in the game containing hints which will help you determine
which brother escaped.
A different door is selected each time you play the game.
The hints also change every time you play the game.
There are a few inescapable traps in the game.
Many of the rooms in the game reset each time you pick up the key.