Hidden Room

The Hidden Room will start to show up in the dungeon, once the upgrade "Hidden Room" has been unlocked. It will be generated following these rules: Oncce the player has identified the right room, they then have to blow up the wall to the connected hidden room using any explosion.
 * always connected to the teleporter room with the most active connected rooms. (the most being three other rooms, since the hidden room will take up a connection as well)
 * if there are only teleporter rooms with two connected rooms as valid spawn points, the hidden room will be connected to one of them.
 * will never be "between" two teleporter rooms that are connected through a single combat room. (The hidden room can't have multiple entrances/exits.)
 * if there are multiple teleporter rooms that fulfill the conditions, one will be chosen at random on level generation that has the hidden room connected to it.

The hidden room can contain almost anything:


 * consumables
 * chests
 * gift boxes
 * little challenge room
 * special rooms
 * item rooms
 * another shop