Blech...
But what's the problem with this game? Well the first screen is one of the most broken levels in the NES library, nearly as bad as most of the games on Action 52. The gate closes on you, and if you walk into the gate, you die! What kind of game is this? Since when does walking into a gate kill you?
But it gets worse. There's gates that go up and down, and you can't predict the movements. You just go and then you die. And if you lose all your lives, you go back to the beginning. Not a problem in most nes games, but in this game it will make you furious.
If you're going to play dragon's lair, go buy the arcade cabinet on ebay.