This is a Flash remake of a text based game originated at the early 80's. the idea was to make a remake of the game that ran on DOS. everything is the same as it was in the original version, including the colors.
The Game is simple and aimed for beginners who wants to try text based game (also known as Interactive Fiction nowdays).
you have to use one of the following verbs in the game
go <direction> or just N for north.
x <something> to examine object.
if you never played on XT with CGA screen games you will probably better to look for other flash online game.