How is it that Super Monkey Ball and Kororinpa are often called puzzle games when neither of them are really that puzzling? Sure, these animal-based high rollers trigger the kind of frustration caused by the likes of Tetris and Meteos, but unlike in puzzle games you rarely have to stop and think.
Mercury Meltdown Revolution is different. Here you're rolling a blob of mercury around mid-air platforms but there are brain-teasing tasks in each level. There are often switch-operated doors between you and the goal, and sometimes you have to change the colour of your mercury before you can finish. What's more, some doors only open when you're a particular colour, which means mixing shades, so split your blob in two then change the colour of each half before sliding them back together to make a new colour.
You might not believe it from this description but Mercury Meltdown can be astonishingly tense. When you've got two blobs of mercury on the go at once you can feel your jaw tighten as one of them starts rolling towards the edge of the platform while you watch the other blob. Along the way you'll also have to look out for mercury-chomping creatures and an electrical generator that zaps you. There's just so much to consider in every level.
The beauty of games such as Kororinpa is their simplicity and occasionally Mercury Meltdown has too many ideas for its own good. Some of the obstacles will make you feel like crying, they're so tricky - for instance, there's a block that moves in the opposite direction to your blob and you have to guide it onto a switch. And you'll often find that if you don't keep your Remote totally still your blob will roll out of the way.
As for the multiplayer mode, racing against your rival's ghost blob is okay but the five party games are more enjoyable with a friend, especially Rodeo which has you trying to keep your mercury from being blown off a small platform by a fan.
Playing with a blob of mercury may not sound as much fun as rolling monkeys but Mercury Meltdown gives your brain a good workout, and that's why it'll last you longer than Monkey Ball or Kororinpa.