hexagon map engine

player start with few default tiles, click and buy more tiles to grow area. (there is no map size limit) we will have (single) and (multiple tile) with different shapes. players will have drag and drop system to put the tiles in the map. including zoom in and out, screen rotation functions. we will have many type of tiles plain grass, hills, mountains. we should be able to use any 3d tile models. (as expected mountain tiles will have heights)