This is a rather difficult puzzle game--and somewhat gimicky. Some of the puzzles feel somewhat unfair (particularly the piano puzzle, requiring what seems like a needlessly precise and long solution, even an indicator telling if you/when you failed would make it feel far more fair. Additionally, some sort of visual indicator on pressing the keys would be nice--many people play w/o audio) Another small issue is that there are similar colors between puzzles with similar input methods (the dial has the same colors as the scrabble board and pieces).
Nonetheless it's a pretty decent puzzle game if somewhat obtuse.