DungeonsGame

                          +-------------------------+
                          |clean realtime data(new) |
              game start  |                         |
                          |load or create db        |
             new or load  |load config              |
                          |convert config to db     |
                          |                         |
                          +----------+--------------+
                                     |
                                     |
                          +----------v--------------+      +------------------+
                          | create backgroud        |      | sa^e background  |
+-------------------------> create player (camera)  |      | save player      |
|                         | create building         +------> save building    |
|    load or create board | create items            |      | save items       |
|                         | create monster          |      | save monster     |
|                         | create i/o point        |      | save i/o point   |
|                         |                         |      +------------------+
|                         +----------+--------------+
|                                    |
|                                    |
|                         +----------v--------------+
|      +------------------> input active            |
|      |                  | input                   |
|      |                  +----------+--------------+
|      |                             |
|      |                 +-----------v---------------+
|      |                 |  input close              |      +------------------------+
|      |                 | +----------------------+  |      | save player            |
|      |                 | |check player condition|  |      | monster if change save |
|      |      turn base  | |player behaviour      |  +------> item if change save    |
|      |                 | |                      |  |      |                        |
|      |                 | +----------------------+  |      +------------------------+
|      |                 | +-----------------------+ |
|      |                 | |check monster condition| |      +-------------------------+
|      |                 | |monster behaviour      | |      | player upgrade          |
|      |                 | |                       | +------> active and save achieved|
|      |                 | +-----------------------+ |      |                         |
|      |                 |                           |      +-------------------------+
|      |                 +-------+----+----------+---+
|      |                         |    |          |
|      |                         |    |          |
|      +-------------------------+    |          |
|                                     |          |
|                         +-----------v--------+ |
+-------------------------+ into i/o point     | |
                          +--------------------+ |
                                                 |
                          +----------------------v---+
                          |game over or final stage  |
                          |                          |
                          +-----------+--------------+
                                      |
                          +-----------v--------------+
                          |  clean runtime data      |
                          |  save achieved           |
                          |                          |
                          |                          |
                          +--------------------------+

        (ROOT)
      /        \
    Dir2      Dir3
    /    \        \
  Dir4 Dir5        Dir6
  /          
Dir7

Observable.Create<int>(o =>
{
    o.OnNext(1);
    o.OnNext(2);
    o.OnCompleted();
    return Disposable.Create(() => Debug.Log("观察者已取消订阅"));
}).Subscribe(xx =>
{
    Debug.Log(xx);
});