The puzzles are helped in no small part by the controls. Mercury Meltdown got its start on the PSP, where it was meant to have tilt control but things didn’t end up working out. A couple iterations later, the game has come to Wii and been given the tilt control it originally wished for, and it works quite well. You hold the Wii Remote like a NES controller, and by tilting in any direction, you tilt the labyrinth in the same direction, causing the mercury to slide that way. You can only tilt the stage a certain amount, which doesn’t seem like much, but it prevents you from doing something stupid as soon as you start the game; it also makes everything less twitchy, which is important in a game where precision is key. The game even is kind enough to let you know if you’re tilting the remote before you start a level. Other than that, the entire game is controlled NES controller style, with no real pointer functionality, though the game isn’t any worse for it. Consistency is good.