The Apprentice

There's a whole genre of magical apprentice games: you're left to your own devices in a wizard's sanctum, a tower, or castle, with a lot of puzzles to solve in aid of furthering your magical education. The Apprentice is a game in this genre, with something of a story— very cod fantasy but still, a bit of a mystery and some motivation. The various puzzles tend towards breaking apart the scenery and using bits in various ways. For the time, there's some player friendly elements to make it a little harder to get stuck.

Of its kind, a good example, though it has now been surpassed.