Here are 703 rooms of pure mapping joy. Mega-Maze First Floor is actually 704 rooms. I leave it to you to find the missing room. 8*)

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|  |     |     |     |  |                    |  |     |  |     |  |  |     |
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|     |        |  |  |     |        |  |  |  |  |     |           |  |     |
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|  |     |     |     |     |     |  |  |  |  |              |  |  |
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            |           |  |     |     |  |        x     |  |  |  |  |  |  |
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|  |     |        |  |     |     |     |  |     |     |     |           |
+--+--+--+--+-x+--+--+--+--+  +--+  +--2  +  +--+--+--+--+--+--+--+--+--+--+
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                                       x
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                                       1

1 = Dylan's Area {15-25}
2 =  Mega-Maze Basement - Part 1 {60-99} (via portal)

Key to Mystic Adventure ASCII Maps