Legend of Demon Castle is at its heart a memorization game, and at times it can feel cheap due to the game often expecting you to plan your moves beforehand over reaction to whatever it throws at you throughout its levels, and to that extent I think it pulls it off masterfully.

This is definitely one of the best NES games, and I was honestly taken aback with how many modern design elements were implemented in it. The game has amazing replayability in multiple routes and different recruitable partner characters who are all pretty competent at their respective roles (usually covering Trevor/Ralph's shortcomings in mobility or attack range, while letting him be the main damage dealer).

The level design is often pretty good (if you keep in mind what the game is going for), and the password system works wonders into making Densetsu a very easily accessible and digestible experience even to this day.

Overall, a MUST play if you're into NES games, no questions asked. This game is a masterpiece.