This is one of the most original puzzle games I have seen. Plus it teaches you how to count and add money, to boot. You grab different coins of the same denomination. Once you have enough of them to add up to the next higher denomination, you release them into the playfield, where they turn into a coin of the new denomination. You can do combos if the new denomination you are releasing is sent to a section of the screen which has "almost enough" coins to change onto another even higher denomination.