Instructions
Count the number of Voltorbs and coins in each row. The top number in each column is the number of coins in that row, while the bottom number (the one next to the Voltorb) is the number of Voltorbs in each row. Tiles marked with a "1" give you one coin, while tiles marked with a "2" or "3" give you two and three coins, respectively, and multiply your total amount of coins won by two or three.
Flip over all the tiles in the rows with zero Voltorbs. You have no chance of finding a Voltorb in these rows and it will make finding the coins and Voltrobs in the other rows easier.
Mark every row whose coin value and number of Voltorbs sums to five. You can mark the squares with either a "1" or a "Voltorb."
Flip over tiles in columns with high coin counts. Look for columns that have values of five or higher and use the squares you already marked to guide you on which tiles to flip over.
Track the amount of coins you have cleared in each row. If you have cleared six coins out of a row that has seven and there are still three more squares you haven't flipped over, don't bother flipping them. Once you have flipped over all of the "2" and "3" tiles you will advance to the next level of Voltorb Flip. The difficulty level will increase, but keep using the same strategy, as it gives you the best chance to win.