Interesting playing a game that was set in Cornwall, UK by the sea but doesn't allow you to go explore outside much.
The castle is quite interesting and easy to explore. The mysteries are all pretty simple and straight forward and 1 or 2 clues allow you to solve the main one. The other ones can be solved by just exploring everywhere and examining everything.
I liked the layout of the castle but it did feel very simplified. There was also a classic Infocom maze, but thankfully easy to navigate.
I enjoyed the game and it's a good way into the IF genre.