Please make the building levels persist after a new raid. There is no point in spending 50 gold on a castle upgrade (or 10K on a barracks or 100K on a tavern upgrade) because you don't get a return on your investment.
Not sure if it happened to anyone else, but on the 2nd level, the Yin/Yang CD icon was collected by me, but not unlocked as an upgrade after the level. The item has been replaced by a gold coin. So without the extra stamina efficiency from that upgrade, I don't have enough energy to get to the end of the level.
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Hello! This is impossible, because it’s one of the mechanics of the game. Only gold buildings are thrown, it’s the balance of the game.