If you're unlucky enough to actually have a copy of Castle of Dragon for some reason, I've got something here that will make it a little bit more interesting.

First, go to the title screen (that's the easy part)

Then, grab Controller 1 and press

A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left

Which is kind of hard to remember. So just keep pressing "A, A, Left, Left" over and over again until the screen changes

Which lets you do all kinds of stuff like: listen to all the songs in the game, listen to all the sound effects, and view all the enemies in the game!

Okay, yeah, this isn't all that great. But it's way better than the actual game, so there is that.