This isn't even close to being the complete piece of trash that everyone makes it out to be, but I can see why it receives so many beatings; it practically begs to be hated in a lot of ways. The most offensive element by far is the slow redrawing of the course that takes place in between shots, and at first I really thought I'd despise the game due to this one issue, as play seemed unforgivably slow and tedious. But even though I don't exactly have the patience of a saint, I actually grew accustomed to the methodical redraws after just a few holes. I use the seconds spent on them to survey the terrain as it pops into view, and the "wasting" of time here isn't as annoying as the multiple delays that afflict almost every shot in Power Golf 2 (which people never seem to come down hard on). Get over that aspect and you'll still need to accept the blocky, somewhat Atari-like course graphics and hideous color choices; and the lack of music during play certainly doesn't make matters any more exciting. But the gameplay actually isn't that bad at all: driving is standard-but-solid stuff, and the putting system is fairly challenging and rewarding. The game plays better and boasts far better course design than Power Golf, for sure. Of course, beating out one of the worst HuCards ever and its so-so CD sequel is nothing to brag about, and Fine Shot Golf on Human Sports Festival is still far and away the PCE's golf-game champ in my book; but JNTG, believe it or not, is actually a pretty respectable title.
With its blocky graphics and ill-advised color choices, JNTG looks more like an old computer game than it does a mighty TG-16 title.
You'll need to use the "overhead" view to get a good idea of where you should go with your shot, as it's often difficult to tell anything about the course from the ugly main playscreen. But as long as you're competent enough to hit the ball straight ahead, you'll usually be fine (unless you set the difficulty to "Expert," but screw that).