The graphic capabilities of M.U.G.E.N are rather limited, but The Black Heart fulfils all expectations thanks to a very studied design and the quality of the animations or sprites. The character design is rather original, and they have a characterization that is a crossover between fantasy and horror.
The game is really entertaining, and managing to finish it with the six characters available can be complicated, specially once we get to the final level, and fight against the last boss who funnily enough is called Final, because his level is very difficult compared to other levels.
The game's quality is rather good, specially if we take into account that the developer has modified everything, the backgrounds, the menus, characters, and even the life bars. This game is really worth a try.