Idle Arks: Build at Sea for Android

According to the story, the world experienced a global flood that destroyed it and plunged it under the water. At the beginning the player has a small raft that can be enlarged and upgraded by getting resources floating in the ocean. 

There are about 100 resources in total, starting with traditional wood and floating bottles and up to magic materials. During the game you will face mysterious civilizations, rescue the survived and recover the destroyed cities. No Internet connection is required.