Just beat Haunted Castle for the first time. With some minor tweaks this could have been a classic.
I can imagine players at the arcade in 1988 giving up after almost immediately being killed walking into a skeleton. My version of the rom doesn't even have a continue system. What kind of person would willingly put more money into this bullshit? Just a horrible design choice for the arcade. Kiki Kaikai was at least a fair game without continues, this isn't.
But there's a lot to like about the game. The first level has blocks fly at you a la Mega Man's Yellow Devil, one part you walk into an interdimensional rift that takes you to some dreamlike world to fight harpies, a portrait that cries a bloody tear in a hallway, Frankenstein's monster is black and white but turns to color when you hit him, etc. Lots of cool ideas here.
It was also a delight to see things referenced in future games. Julius Belmont's theme, the bitchin song that plays when he fights Soma in Aria, is the song from the last level here.
But the astounding difficulty and lack of a continue system is just too much for any normal person. The PS2 release included a 'superplay' video that only made it to the fourth level (there are six levels). Tweak the hitboxes, don't die in two hits, let the player continue - doing this would have helped tremendously. The development history of this game was troubled, and Konami had an entire team from another game help the team working on this finish it.