I made a post about The Castle for FM-7 a while ago, but I recently picked it up for the X1, and, perhaps due to being able to use a game controller on this version rather than the keyboard, I was able to get further. Plus this one comes with the original box and instruction manual. All in all, it's a very nice package!

Whether it was down to the game controller or simply having more experience, I got through much more of the game this time, With the FM-7 version, I only made my way through about six rooms and never got the map, but on the X1 version I got through 13 rooms and was able to get the map, in addition to getting about 3.5x the score I achieved on the FM-7 version.