Well, I played a little bit of it yesterday. My impression of it is quite positive. Here are some thoughts.
You play as this kid Max who apparently wears some sort of animal costume like a wolf. He likes to roar at people, and he one day sailed away from home and managed to get to a new land with some giant troll-looking creatures. Very random.
The graphics are quite pleasing to the eye, even if they don't really push the DS much. There are some really really nice multiple scrolling backgrounds that are very well detailed. There are a fair amount of those old school mode7-like effects too, used to animate certain characters. The attention to detail impressed me. The levels are rather lush and give a lovely atmosphere. There are some nice fog effects too. Very nice 2D art overall, with some hint of realism mixed with fantasy.
Sound wise, the game also pleases for the most part. The tunes are pretty catchy, if not the best ever. It never gets annoying to listen to the music. I found it quite pleasing to the ear and also fitting to the atmosphere and mood. The one thing that isn't great is the sound effects. The most jarring noises being Max's sounds. His roaring and jumping effects are just horrid to my ears.
Gameplay wise, it won't win any awards for innovation, but it IS quite a capable and fun 2D platformer. I actually see some similarities between this and the US Mario 2, at least in the combat mechanics. Basically, if you have played any standard 2D platformer, you know what to expect. The level design is nice, and the environments are varied and atmospheric. Jumping on enemies doesn't work though. You have to roar at them to stun them, in which you can then pick them up and toss them away or at other enemies. This picking up and tossing mechanic reminds me of classics like Mario 2 and even the Mickey's Magical Quest series on SNES. It's quite fun, and some bosses seem to take a bit of strategy. There is one really neat little aspect of the platforming that makes nice use of the multiple scrolling backgrounds. You can actually jump in and out of the foreground and background. It has been done before, but I always liked the effect and thought it was a nice way to simulate the effect of a 3D environment without true 360 degree movement. Overall, the gameplay isn't new or anything, but it's solid. There is a piggyback mechanic with the giant troll people where you can press their icon on the touch screen in order to climb on their backs and bypass spikes and other hazards. This is the only flaw, is that you HAVE to touch their icon to use them. It's just another stupid and worthless use of the touch screen that I wish developers would shove up their ass. Could have easily used any of the unused or unnecessary buttons. It's a mechanic used sparingly so far though thankfully.
So yeah, I was caught off guard at how nice this was. I never heard of this movie or story until I saw a trailer while seeing the new Harry Potter movie in theaters. I didn't expect a game of it to be any good, but I took a look and was pleasantly surprised. Anyone looking for an attractive 2D platformer but isn't looking for innovation should give this a go, it's worth it. This is just my opinion though.
Impression wise, i've only beaten about 3 levels so far. But from my early play, here are some of my scores. All are opinions of mine only.
Graphics- 9/10 (lovely 2D, but nothing that pushes the DS)
Sound- 8/10 (great music, bad sound effects)
Control- 9/10 (one point docked for stupid touch control)
Gameplay- 8/10 (you won't find any innovation, but some damn solid old school gameplay)
Overall- 8/10