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GameSpy PSP: Review, by Christian Nutt: "When Mercury is at its best, it's an elegantly simple and addictive action-puzzler. When it's at its worst, it's like a tedious pop quiz from an unpredictable, bad-tempered teacher." [Score: 3.5 out of 5]
GameZone: Review, by Rob Watkins: "Mercury is a great puzzle game and a worthy contender so far to the others available on the PSP." [Score: 8.1 out of 10]
Gaming Age: Review, by Jim Cordeira: "It doesn’t really have the endless appeal of something like Lumines, Puyo Pop or Tetris, but the problem solving, logical puzzles and interesting physics make it nonetheless enjoyable." [Grade: C+]
IGN PSP: Preview, by Nix: "The simplicity of the game is the big question left remaining after this first play-test."