The Master System is a great console a lot of North American retro gamers never got into thanks to the iron fisted dominance of the NES. I'm a big fan of the system, and love to see people showcase its games.
However, I feel like you should have mentioned that this game is an uncommon European exclusive so people know they can't simply go to their local retro game store and expect to find a copy. Also it is worth mentioning that the Master System is 99% region free, so PAL Master System games including Master of Darkness play just fine on a North American Master System.