Its the "True Challenge" achievement. You need 6000 for a giant, and you have 15 minutes.The mine gives you 5 coins/sec while you can't upgrade it.Ive calculated it, and you need 20 mins to get 6000 coins while a few more mins to unlock the giant.
6000/5=1200 1200/60=20 can you extend the time or add some other way to get coins other than waiting for them to come and selling towers?
6000/5=1200 1200/60=20 can you extend the time or add some other way to get coins other than waiting for them to come and selling towers?