Map scalability

If the game really does allow unlimited players (#35) instead of just using an interface redesign, the map needs to be scalable to avoid overcrowding of the battlefield.

This raises the issue of being able to hit targets from great distances without targeted weapons.

Additionally, the user should be able to move the camera position to see the rest of the map.

Start by reviewing issue #35 and the current map, targeting, and camera behavior in the Swift game. Define how unlimited-player maps, long-distance targeting without targeted weapons, and camera movement should work, then verify that the battlefield remains usable and the rest of the map is viewable.

Written by the indexing model from the issue text.