Make sure that the camera tracks the player in both directions.

[133794m3r]

The current code doesn't keep the playfield visible with the player. If the player moves towards the end of the level the camera stops and doesn't show them all the way to the edge. This merge request only makes sure that the entire playfield is shown not that the player is confined to the map's tiles.

All files that have the "final" version of the camera from the exercises have been updated to use the corrected camera.