What are boosters?

Hammer: Pops one Cube or obstacle of your choice. (If the obstacle has multiple parts, such as cans, the Hammer will only break one part of the obstacle)
Boxing Glove: Pops the row of the selected Cube
Anvil: Pops the column of the selected Cube.
Dice: Shuffles all of the cubes on the screen

How can I buy coins?

Open the game and tap on the Shop button at the bottom left corner
Choose the amount of coins or bundle youddd want to purchase
Proceed through the Apple/Google payment process