Beautiful, sadly this game requires too much energy and materials to upgrade a building. Now I'm lv 20, it seems forever. A building still unfinish since a week ago, a building could reach til lv 3 upgrade before it completed. Tons of materials, each of them cost hours to make (tiered items). Everyday i play, still need a lot of things. Tired and getting bored. I playing similar games, my progress much better there. Idk how long I'll keep this one.