The sound quality is very poor, as was the case with many 3DS games released close to the system's launch.
The framerate has very poor stabalization, especially on the PAL release, and sometimes the framerate sometimes gets unstable for no apparent reason, which can slow the game's pacing down a lot of times throughout the experience.
The Globox Village has been removed, despite the entrance to it still existing in the Woods of Light.
There are plenty of weird glitches, some of which weren't even in the original versions of this game and can easily be accessed by messing around with the game a few times.
The 1000th Yellow Lum in the Tomb of the Ancients is completely inaccessible without glitching, as the spider web that you're supposed to use as a trampoline is coded as a static platform.
The game doesn't really improve the graphics (aside from a new model for the powder kegs) or fix any of the flaws from the original port, which is inexcusable since the orginal game was practically eleven years old by the time that this game was released.
The new render of Rayman 2-era Rayman on the North American cover is extremely well-done, and faithfully recaptures the original boxart.
The lighting is much brighter, making some dark areas a little more playable, even if this might have happened because of the poor programming.
While the glitches are abundant and can be distracting, they never really damage the gameplay to a large extent.
As stated earlier, minus the Globox Village, it's pretty much the same game, so if you want to take Rayman 2 on the go, it's a far better option than Rayman DS.