i think that we should be able to spend the gems that we have. so say that you are upgrading an archer queen to lvl 5. this costs 1,000 gems. you only have 400 gems. so you touch finish now and it will say you do not have enough, buy more? and it would say spend gems: <400> you could change the ammount that you wanted to spend and it would now only take 600 gems, saving time
