Goat Bean Golf 2005 is a mini-golf game with more features and depth than most if not all mini-golf games.
The game features: 54 holes in 3 18-hole courses, 1-4 players, a level editor with in-game online level submission (and download) and the ability to create your own 18 (or less) hole courses, online high score and world money leader boards, tournaments against computer opponents at two difficulty levels (Amateur and Professional), custom music, tons of replay value, and much more.

The game also features a shop to purchase new level editor items, courses, and mini games with the money you earn by playing tournaments and other modes. There are a bunch of hidden extras and it should take a while to unlock everything. It only takes a second to learn and a lifetime to master.