Similar to the movie, 'LEGO Indiana Jones 2: The Adventure Continues' doesn't compare to the original Lego Indy game, BUT it does seem to hold on it's own quite well.
I would not call this game 'short' in any way, but does feel easier than the original, mostly because of lack of collectibles and an increased number of minigame-type stages. Some say this may be better because it allows for more of a free-roam experience, but it led to confusion at times when searching the overworlds for certain stages. Plus it's required that you know what character are needed for each level, if you one that is equipped with the wrong item, you have to go back to the overworld, grab a character that fulfills the required item (eg. shovel, whip, bazooka) and only then can you advance.
Overall I would give this a 7/10. Again, I can't be too critical as this game is meant for kids, but it does seem significantly easier than previous installments in the LEGO game series. Maybe just completing the story you may find it a little lackluster, but with that being said, I did have quite fun completing it too 100% and suggest anyone pick this up if it ever goes on sale. Usually Lego game are at a consistent $20 which, in my opinion, is pretty steep, BUT if you ever find it at 50%-75%, it really is worth it.