With this game, you expect to see those goofy little worms and their arsenal clearly and identifiably. That's what you get, basically: angry worms, happy dancing worms, tired worms along with their bazookas, blowtorches, and lots of other tiny items of war. Worms: Open Warfare 2 fits about as much as it can on the small screens. It still leaves you with a good view of the landscape that extends through both screens. Although I can't compare this to the first Worms DS game from direct experience, it seems like this game has more of a polished look to it, right down to the fonts chosen.
I was at first a bit worried about having to aim through the "split" between the screens, but it works pretty well. If I could ask for anything, it would be a zoom-out ability - not just a map. If I were speaking directly with St. Nicholas himself, I'd ask for the ability to play the game sideways, so I could get a different view of the field. But really, the game plays fine in this form. As always, it's nice that the menus don't hog the screen all the time.
Worms: Open Warfare 2 (sorry for the repetition, but you'll have to understand I can't call this WoW 2 without causing undue confusion) has a familiar soundtrack and set of sound effects. They still work well: you've got your different worm accents, a range of background music from atmospheric battle to jaunty pirate themes, and satisfying explosions to top it off. No, there's nothing particularly new here, but sometimes it just ain't broke.