// an object containing the state of a game
state = {
  level: string, // unique id of level object (see datastructure.js)
  changes: [{ // stores changes to the actual labyrinth, to override definition in level object
    wall/borderid: string,
    newtype: "type"
  }, ...],
  entities: [{
    type: "type", // if different from start type
    x: int, // start x
    y: int // start y
  }, ...],
  flags: [string, ...], // all flags currently set (if any)
  vars: { // all variables with nonzero values (if any)
    var: int, ...
  },
  moves: int // number of moves used so far
}