One of the developers, who serves PIROWO, rediscovered the Magic castle source code for some time. They decided to finalize it and launch it, four generations of console later.
Magic castle has some interesting tricks up its sleeve, like EuroGamer grades. It features dynamic music and you can customize the position of the user interface. There are four character classes to choose from and 20 floors with random elements to make your way.
You can download the game from the Internet Archive and play it with an emulator. To give you an idea of what to expect, here’s the original VHS argument that the Magic castle sent to publishers.
The story may not be over yet. The Internet Archive page for the game reports that the game is in a fully playable state, except for a few missing features: support for four players and a Japanese translation. He promises that an updated version will arrive soon.