Basically, the point of the game is to solve a series of problems and puzzles to get from the beginning of the game to the end. This is accomplished through character interaction and the use of objects; the most basic and long lasting formula for all adventure games. For some it works, and for others it doesn't.
Mystery of the Druids just doesn't have the right ingredients to pull this off.
Not since the days of Sam and Max and Monkey Island have I really played a great adventure game. Such classics are hard to beat, and for good reason. First and foremost is the storyline, which must be interesting enough to get someone to sit through the entire game. Mystery of the Druids tries, but fails miserably. A druid cult that travels in time to Stonehenge seeking some sort of Godly power is neither unique nor intriguing. I prefer escaped circus freaks and perverted rabbits.
Overall, the game's attitude seems to be caught in limbo, unable to decide whether to be serious or funny. The serious side is apparent from the ominous music and lack of adequate comic relief. A few witty remarks here and there might draw a chuckle from the player, but nothing memorable. It's not going for hilarious jokes, either, but it doesn't seem to meet the standards of games like the King's Quest series.
A lot of the characters you'll meet along the way won't be memorable even a few weeks down the road. There might be a couple of people that will bring a good memory along with them later in life, but there are definitely no LeChucks or Threepwoods to be found anywhere within the boundaries of this game.
Most of the problems you'll face in the game will be generic, and you'll usually figure out what you have to do before you even get there. The few puzzles thrown in will get your brain going a bit, but there are really no interesting solutions to them. It feels more like you've completed part of a job than solved a harrowing problem.