Alot of people consider the first Monkey Island game to be better, because it was original. It's usually hard for a sequel to succeed, because it has to improve without losing what made the original good. And I think LeChuck's Revenge did that, it's a better game, in my opinion. The humor is as good if not better, and it doesn't have the slow start that the first game had. Obviously it's not the start of the journey, so that helps, but still I give it much props for that.
The gameplay is the same, a point-and-click adventure, with a pirate theme and a whole lot of jokes and silly dialogues. You explore the environment trying to discover what to do next, finding itens or directions through poking around. You can also make a hint pop on the screen by the press of a button if you aren't sure or what to do next or if you doesn't want to go faster through the game.
A very unique game, might be the funniest I've ever played. Despite not being my favorite genre of games.