Dark Tunnels
============

+-- Level +5 ---------------------------------------------------------------------------------------------+
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|   *                 *                                                                                   |
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|      *--*           *                                                                                   |
|       \            / \                                                                                  |
|        \          /   \                                                                                 |
|         *        *     *                                                                                |
|          \      /                                                                                       |
|           \    /                                                                                        |
|            %--*                                                                                         |
|           /v                                                                                            |
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|      *                                                                                                  |
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|         *--*                                                                                            |
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|         *--*                                                                                            |
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|         *--*                                                                                            |
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|         *--*                                                                                            |
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|         *                                                                                               |
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|         |^                                                                                              |
|         M                                                                                               |
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+---------------------------------------------------------------------------------------------------------+

+-- Level +4 ---------------------------------------------------------------------------------------------+
|            ^                                                                                            |
|            %                                                                                            |
|            v                                                                                            |
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+---------------------------------------------------------------------------------------------------------+

+-- Level +3 ---------------------------------------------------------------------------------------------+
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|                                                      ^                                                  |
|                                                      *        *--*                                      |
|                                                     /|\       |  |                                      |
|                                                    / | \      |  |                                      |
|                                             *>    * <*  *--*--*  *--M                                   |
|                                                      |              v                                   |
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|                                                      *           *--*--*                                |
|                                                      |\          |      \                               |
|                                                      | \         |       \                              |
|                                                      *  *        *        *                             |
|                                                      |   \       |        |                             |
|                                                      |    \      |        |                             |
|                                                *--*--*     *--*--*        %                             |
|                                                                           v                             |
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+---------------------------------------------------------------------------------------------------------+

+-- Level +2 ---------------------------------------------------------------------------------------------+
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|            %                                                                                            |
|            v                                                                                            |
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+---------------------------------------------------------------------------------------------------------+

+-- Level +1 ---------------------------------------------------------------------------------------------+
|            ^                                                                                            |
|            %                                                                                            |
|            v                                                                                            |
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+---------------------------------------------------------------------------------------------------------+

+-- Ground level -----------------------------------------------------------------------------------------+
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|                        *                                                                                |
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|         *                 *           *                                                                 |
|          \               / \         /                                                                  |
|           \^            /   \       /                                                                   |
|            %           *     *     *                                                                    |
|             \         /       \   /                                                                     |
|              \       /         \ /                                                                      |
|               *     *           *                                                                       |
|                \   /           /                                                                        |
|                 \ /           /                                                                         |
|                  *           *           *                                                     *        |
|                   \           \         / \                                                   / \       |
|                    \           \       /   \                                                 /   \      |
|                     *           *     *     *           *        *        *--*--*           *     *     |
|                                  \   /       \          |       <        / \                |      \    |
|                                   \ /         \         |               /   \               |       \   |
|                                    *           *        *  *           *     *     *--*--*--*        *  |
|                                                 \       | / \         /       \   / \               /   |
|                                                  \      |/   \       /         \ /   \             /    |
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|                                               \     \ /         \ >   \       /     /   \       /       |
|                                                *     *           *     *--*--*     *     *     *        |
|                                               / \   /           /     / \     \           \   /         |
|                                              /   \ /           /     /   \     \           \ /          |
|                                             *     *           *     *     *     *           *           |
|                                            /                 /|          /     /                        |
|                                           /                 / |         /     /                         |
|                                          *                 *  *--*     *     *                          |
|                                           \               /      |    /     /                           |
|                                            \             /       |  ^/     /                            |
|                                             *           *        *--%     *                             |
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|                                                               *              *                          |
|                                                              / \             |                          |
|                                                             /   \            |                          |
|                           *           *--*--*              *     *     *     *                          |
|                            \         /       \                    \   / \    |\                         |
|                             \       /         \                    \ /   \   | \                        |
|                              *     *           *                    *     *--*  *                       |
|                               \   /             \                                \                      |
|                                \ /               \                                \                     |
|                                 *           *     *  *                             *                    |
|                                / \           \   /   |                            /                     |
|                               /   \           \ /    |                           /                      |
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|                             /       \           \    |    / \   / \         /| /                        |
|                            /         \           \   |   /   \ /   \       / |/                         |
|                           *           *           *--*  *     *     *     *  *                          |
|                                                  / \   /     /       \   /                              |
|                                                 /   \ /     /         \ /                               |
|                                          *     *     *     *           *           *                    |
|                                           \   /             \                     / \                   |
|                                            \ /               \                   /   \                  |
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|                                              \               / \         /|    /       \                |
|                                               \             /   \       / |   /         \               |
|                                                *--*        *     *     *  *  *           *              |
|                                                           /       \   /   | /            |              |
|                                                          /         \ /    |/             |              |
|                                          *              *           *     *              *              |
|                                           \            / \               /               |              |
|                                            \          /   \           < /                |              |
|                                             *        *     *           *     *     *     *              |
|                                            / \      /                   \     \   /      |              |
|                                           /   \    /                     \     \ /       |              |
|                                          *     *--*              *        *     *        *              |
|                                         /                       / >        \   /         |              |
|                             <          /                       /            \ /          |              |
|                              *        *                       *              *--*        *              |
|                               \                                                         /               |
|                                \                                                       /                |
|                                 *                                               *     *                 |
|                                  \                                             /|    /                  |
|                                   \                                           / |   /                   |
|                                    *                                         *  *--*                    |
|                                     \                                       /                           |
|                                      \                                     /                            |
|                                       *                                   *                             |
|                                        \                                 /                              |
|                                         \                               /                               |
|                                          *--*--*--*--*--*--*--*--*--*--*                                |
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+---------------------------------------------------------------------------------------------------------+

+-- Level -1 ---------------------------------------------------------------------------------------------+
|                                                                     ^                                   |
|                                                                     %                                   |
|                                                                                                         |
+---------------------------------------------------------------------------------------------------------+

+-- Level -2 ---------------------------------------------------------------------------------------------+
|                                                                     ^                                   |
|                                                                     %                                   |
|                                                                                                         |
+---------------------------------------------------------------------------------------------------------+

+-- Level -3 ---------------------------------------------------------------------------------------------+
|                                                                                                         |
|                                                               *--*--*                                   |
|                                                                  |                                      |
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|                                                                  *                                      |
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|                                                                  *                                      |
|                                                                   \                                     |
|                                                                    \^                                   |
|                                                                     %                                   |
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|                                                                        *                                |
|                                                                         \                               |
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|                                                                           *                             |
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|                                                                           M--*--*--M           M        |
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|                                                                        *--*--*     *           M        |
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|                                                                                    *           M        |
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|                                                                                    *           M        |
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|                                                                                    *           *        |
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|                                                                                    M--*--*--*--M        |
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+---------------------------------------------------------------------------------------------------------+