This is what could be called a "real time" arcade adventure, although it ends up being a kind of glorified Pac-Man.
There are nine inter-connected rooms, each occupying one screen. They resemble a Pac-Man maze, complete with snakes or spiders or whatever to chase you.
In each, there is a key and a sword. Picking up the sword means you can kill whatever is chasing you, picking up the key means you can open the treasure chest that corresponds to its colour.
Some treasures have particular properties. When you have collected all the keys and some treasure, you go up a level where there are different things chasing you, but the things are basically the same.
The graphics are reasonable and there are comprehensive instructions. I found the game did not have the addictive appeal of some that will draw you back time and time again.