Plague is a parody on COD zombies and as such play's similarity to that game mode.

The first map is called Kalaja or castle in Austrian. This map is a small castle along a coast with an enchantment table.
But the better map for your first time would the boat map of Pero. Although this map has a wider variety of mobs to fight against the map is easier with no doors and being very open.
The third map is called Valhala and is a viking style village map. this is the only map with a bow that you can buy.
The fourth and final map of this game is called Temple and it is a temple next to a battlefield inside a mountain with a secret room. this map doesn't have an enchanting table but within the secret room is a powerful weapon and a diary which might just lead to a second part...

It is important for you to copy the world file before each playthrough and playing on hard difficulty will give you the best experience

And so, please play and enjoy!