Flop Master

Can you keep the balance of a stack?
Our employee is stuck on the stack of construction products. The stack is unstable, it could flop over! Tap on the object that you want to remove. However be careful, that one could be the one that keeps the balance. One tap and boom! Everything fell on the ground. Every move needs attention, you should choose the order wisely. Otherwise our employee flop over and can’t make it to the ground safely.
We don’t want that, do we?