Compared to Cing's later works in Hotel Dusk and Last Window, Trace Memory feels more like a rough tech demo for the DS... but what a charming little tech demo it is! You play as Ashley Mizuki Robbins, the daughter of two scientists who were presumed dead years ago, only for Ashley's father to send her a letter years later asking her to come to Blood Edward Island to learn the truth. Accompanying her is a device named the Dual Trace System (DTS), which very much resembles the classic DS model and can read DS game cards data cards scattered around the island of her father's logs. She eventually bumps into the ghost of a boy named "D", who also doesn't remember a thing of his past, and together, Ashley and D must navigate the abandoned island's sprawling mansion to unravel the mysteries of their respective pasts.

Puzzles are a bit of a mixed bag admittingly. A few of them are a bit rough around the edges; during multiple parts of the game, I had trouble grabbing or contacting objects on the screen with my stylus due to really imprecise or tiny hitboxes. In addition, a good chunk of the puzzles are extremely simple: some are tap and drag puzzles like breaking a bottle or rotating a crank, and a few are just inventory puzzle chains (item A will get you item B which is used to obtain item C). Nevertheless, I do have to respect the ambition for certain sequences. The DTS also comes with an in-game camera to take pictures of scenery so you don't necessarily need a pencil and paper alongside you while playing, but there's also a nice overlay feature that lets you place images on top of another image made transparent to decode hidden passwords; it's a nice little gimmick that I wish was utilized a bit more. I also have to give Trace Memory credit for utilizing practically every feature of the DS, with a couple of microphone puzzles and another DS open-shut puzzle that I think is basically Cing's speciality considering I have yet to see any other developer tinker with that idea. Outside of these interactive puzzles however, I do wish that the inventory puzzles were a bit more facilitated: key items have to be obtained from tapping around observable scenes that appear to have a lot of distinct items of interest, but upon tapping in many of these areas, most end up as red herrings that only provide a single line of flavor text. I also admit that as short as the game is (five hours, about half the length of Hotel Dusk), it was a bit easy to get lost within the mansion since I wasn't provided with a map but often had to backtrack to previously explored locations in past chapters for key items that became obtainable once I passed the right checks in future chapters.

Trace Memory's doesn't quite achieve the same feeling of presence as what I'd come to expect for Cing, with its strange mouth animations upon still-figures (as opposed to Hotel Dusk's distinct inky animated character models) or its fairly contrived puzzles that seem to make little sense in the context of its narrative (as per most tech demos), but I do think its heart is in the right place. Despite how much flavor text I had to mash through just tapping everywhere, picking up on those little details to add to D's past or stumbling upon another data card kept me engrossed in the central mysteries for tighter world-building. While I do prefer the first-person 3D environments of Hotel Dusk as opposed to the top-down exploration of Trace Memory, I have to concur with MelMellon that the ability to highlight more specific areas of interest in 2D while displaying its more vast environments in 3D grants Trace Memory a combination of detail and immersion that few games manage to achieve. Finally, even if the central narrative isn't quite as intricate or intimate as Cing's future work, the game wrapped itself up quite nicely with no plot holes (and keeps you aware of the running plotline with its end-of-chapter summary quizzes, much like Hotel Dusk would later utilize), and the final reveal of D's fate as a reward for thoroughly exploring the mansion and unlocking all his memories made the whole experience worthwhile. I came in expecting a short cozy adventure game highlighting both the potential of the DS and Cing's early ambitions, and I got just that, so all in all, I'd say it was a pretty good day.