Have a go at Combine from Mind Jolt Games. At first it looks like just another three ball match game. The twist is that combining three balls of one color creates a new ball of the next color up the line. It’s not a button masher. It takes some ability to think ahead logically — and allows ample time to do so — to position new balls in the best place for clearing them later. It’s pretty nifty. Hope you enjoy it as much as I have.