Update: where I thought you could only use diamonds to complete quests, there are actually 3 options available to finish them, diamonds not required. Makes it much easier to complete and more fun! Updated to 5 stars! It's been relatively fun until now. I need more diamonds to complete the current quest, but the game offers no way to get diamonds except through purchasing. I am building tools and food and gaining coins, but that is all I can do without purchasing diamonds to complete the quest. It's way too early in the game to already be at an impass. It's disappointing.