The puzzles in the original PC version of
Myst were obscure to begin with, but on the DS they're even more difficult to decipher owing to the tiny screen size and lack of mouse curser. And let's face it, one of the most compelling things about
Myst, back in the day, were the graphics -- which were some of the first to take advantage of new CD-ROM technology and for the time were pretty breathtaking. On the DS, however, graphics are compressed and low-resolution, which means that walking around no longer has the air of discovery and wonder which gained the original game such praise. The DS-specific addition of a note-taking feature also falls flat, since instead of a logical doodle-pad to use with the stylus, you're given a type-writer to laboriously peck out sentences key by key. Graphical glitches and poorly-implemented stylus interface round out this dubious port.
If you absolutely have to play Myst, the game is best experienced with a monitor and mouse, so find a version that will run on your PC instead.