If you have deep pockets and you are willing to spend some $ on this game here's what you can pick up:
These restore your CP meter which allows you to participate in new matches. They're available in a variety of quantities and prices vary by region, so check inside the shop via your device.
This boost will shuffle all of the tiles on the grid if you've found yourself hopelessly out of your depth in a round!
If you want to get your own back on your opponent, brush aside that bucket of sand that's graying out your screen with one of these brushes.
Send the boss packing with a tipple! Using one of these will remove all of the boss faces from the grid.