The Map is where players play in. Players cannot cross the borders of the map, but pieces of players can partially cross the borders as long as the center of the piece still is inside the borders. The map is square-shaped and is ~11,000 pixels in width and height. Each server has its own map. In the map spawn pellets and if there's not enough of them - viruses. In Experimental Mode, spawners are placed/scattered around the map. Maps look a bit like notebook paper. It can also be colored black if the player selects the Dark theme mode in the Options.
Depending on the game mode and the user preferences, players can see the dimension of the map, their own position and size and additional information in the minimap. This is a miniaturized version of the map, being displayed in the right bottom corner of the windows.