I'll admit I'm not the biggest Kirby fan; hell, when it comes to the games I can say have significant replay value, I can count them all on one hand.*
Fortunately, this is one of those few. A golf game with a Kirby twist, the basic goal is to hit all the enemies on the field; the last one standing will turn into the hole. Then just sink Kirby in there and you're on to the next stage. Sounds pretty simple, but it's made more difficult by all sorts of hazards; hills, spikes, Krackos, Whispy Woods, water and sand traps, and, of course, falling out of bounds. You'll also have to use Kirby's trademark copy ability to get all sorts of powers to help you out; sticking to slopes with Spikes, slowing your descent with umbrellas, and so on. It's easy to pick up and play, but mastering it is a real challenge.
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Fun game, but some stages (especially the later ones) can get really frustrating, especially if you're going for all silver or gold medals to unlock the extra courses.
* The others are Kirby's Adventure and Kirby Super Star, if you're really curious.