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I would like to commend the author for creating a beautifully drawn map and for allowing players to play through the scenario as the Naga. However, there are a few issues with the gameplay:
1) On the scenario loading screen, the city appears as it does in Heroes 6, but in reality, it looks like a fort. All the dwellings on the map are Elven, not Naga. This may be why the city's shipyard cannot build a ship.
2) Above the city, there is an empty garrison with a purple keymaster and a purple border guard behind the garrison. However, it is impossible to reach this location without a ship. There are also red and green border guards on the map, but there are no keymasters for them, so I had to use cheats to move around the map.
3) Above the Kappa dwellings, there is a portal that should transport the player to the island in the upper left corner of the map, but it does not work.
4) It is not possible to visit the Temple of Magic Passage to the left of the Necropolis.
5) I defeated the Orcs and the Necromancer, but the quest was not completed, and the scenario does not end.
It would also be beneficial to add more quests to the scenario, such as freeing allied units or destroying all the Orc settlements, since there are so many of them on the map.