Dark Tunnel
===========

+-- Level +1 ---------------------------------------------+
|                                                         |
|         *--*--*--*                                      |
|        /          \                                     |
|       /            \                                    |
|      *     *        *                                   |
|      |    / \        \                                  |
|      |   /   \        \                                 |
|   *--*  *     *        *                                |
|   v      \     \        \                               |
|           \     \        \                              |
|            *     *        *                             |
|            |      \       |                             |
|            |       \      |                             |
|            *        *--*--*                             |
|             \                                           |
|              \                                          |
|               *@+*--*                                   |
|                      \                                  |
|                       \                                 |
|                        %                                |
|                        v                                |
|                                                         |
+---------------------------------------------------------+

+-- Ground level -----------------------------------------+
|                                                         |
|                              *#-*#-*  *#-*#-*           |
|                                 |        |              |
|                                 |        |              |
|                              *  *        *              |
|                              #  #        #              |
|                        ^     |  |        |              |
|                        %--*--*#-*#-*--*#-*#-*#-M    <*  |
|                                 #        #              |
|                                 |        |              |
|                                 *        *              |
|                                 |        |              |
|                                 |        |              |
|                              *#-*#-*  *#-*#-*           |
|                                                         |
+---------------------------------------------------------+