I got 19 on it back in the Winter of 2001...as I remember, the only one that is really hard to hole in one is the one that looks like a giant s... I've only gotten it once, and unfortunately screwed up on a number of others.
This game has been mentioned before. YES! It is extremely addictive!!! Don't forget to add Morphine, Cocaine, and Marijuana to the combination in the thread title.
It is possible to get the 18. I did it about a year ago and swore I would never play again after spending so much time on it.
I do recall, though, that the trick to many of the holes was to do it geometrically. In other words, set the ball down at a certain spot on the green and then aim the ball at a fixed point on the course.
At my old job, we would get a good score, print the score recap, and tape it to the door of our competitor, as a way of saying, "Beat This One, Sucker".
I started a new job, and was amused to find, in one of my desk drawers, a printout of a perfect 18 score on minigolf. Apparently, it has made it's way around.
For even more fun games, try this link . The helicopter one is now the most popular.