Rare L here, Wiz. Fans of Ghostbusters will enjoy the game as the music is good, the levels challenge between side-scrolling and driving, and there is difficulty to keep replay up. I would yield that, yes, memorization is key, however.
Yeah, dude! Plenty of weapons/items and secret items and Kevin can move quickly. There are boss fights and the music is decent. It's not a terribly long game, especially for better NES players, but I'd recommend it to action/platformer fans of the NES.
Here's a Barney ESRB that sold on 11/13 for a reasonable price ($14.55). It's uncommon for sure, but I would have a hard time paying too much more for it as they always seem to sell for $15>.
https://www.ebay.com/itm/375054350266?_trksid=p2349526.m43663.l10137&nordt=true&rt=nc&orig_cvip=true