There should be a harbour which would work in the same way as the army camp but only for water units
You could train water units in the shipyard (equivalent of barracks)
So that you can attack villages that are in the centre of the map you could add streams running through the village.♥
Lvl 1. Shipyard: the dingy ; a unit which is a small inflatable boat which would have an archer in it so that it can attack villages.♥
Lvl 2. Shipyard: the battleship; a larger water unit for attacking villages it could have mortars or cannons for its weapons
Lvl 3. Shipyard: . This woud be great for creating an in game mini game where you could try to intercept other people's cargo ships and raid them for elixir and gold using your water units
Lvl 4. Shipyard: the giant squid; it could be a unit that attacks defenses and has giant arms/tentacles and they hit buildings and defenses to destroy them
Lvl 5. Shipyard: the dam buster; a dingy with a twist instead of having an archer in it it would have a wallbreaker. ♥Used for destroying dams so that water units can progress up streams
Lvl 6. Shipyard: the lough ness monster (sea creature); could be a unit that fires slime and it has a splash damage effect kind of like the wizard
Lvl 7. Shipyard:♥the pirate ship; it could be a unit which has 4 cannons on it and can be used for either attacking or looting cargo ships.♥
Lvl 8. Shipyard: the lifeboat; a water unit that could either have 3 healers on them or if possible it could be able to take home troops that you have deployed in a battle that have not died or taken any damage at the end of it that you could take back to your village.
Lvl 9. Shipyard: water dragon; a dragon that breathes water instead of fire and it is blue
Lvl 10. Shipyard: the submarine; a unit which is hard to destroy and also has 1 cannon and 2 mortars for attacking or looting cargo ships. This could also be a chance to create new defences like under water mines.♥
Either a new building type (beavers hut) for building dams in your steams to try prevent enemy's progressing up towards your village or in the shop you could buy dams like you can buy walls for barricading your streams to hinder attackers. Or a new dark elixir troop the beaver which you can use in your own village to make dams or you could attack with it and it can chew through dams or walls.♥
New building type: the lighthouse; used for finding cargo ships and when it finds one you could click on an exclamation mark (!) above it (kind of like when you're collecting gold and elixir) however it should be a random cargo ship that you attack and should only have a certain number per day available to try to loot
