Giant Sushi: Merge Master

You drop sushi pieces onto a table and merge two of the same kind into the next tier up, the same basic loop as those 2048-style merge games but reskinned with nigiri and rolls instead of numbers or fruit. Space runs out fast, so most of your decisions are really about where you're willing to let a piece sit while you wait for its match to appear. It's low-stakes and a little repetitive by design, more of a fidget than a challenge.