On the game we rule level 2 the objective is to plant some wheat and use mojo to make it grow quicker. How do you use mojo? There is no button or anything.
When you touch the spot where you are growing crops, you see a pop up with the remaining time and a little blue icon that says "use mojo", click that. ciao
When i press something that is growing i just comes up with the harvesting bar but does not harvest after 5mins