Looks the part, but certainly doesn't play it. Backgrounds and graphics are accurate to the NES version without being scrunched.

Now for the boat load of why it's not CastleVania. Simon can't walk up or down stairs and must jump up them or fall down them. Stairs have to be right for any CastleVania. Controls a bit slippery, very high jump to just leap over walking enemies. Don't have to duck under low ceilings in the 4th level. Lack of sound. Bosses just idle. Enemies disappearing once they walk past. No knock-back to the glee of many, but it's just not CastleVania without it. The brutal 5th level walk to the Reaper is devoid of enemies. Hopefully all these problems get sorted out.