Turning this into a 'golf' game was a really cool idea. I enjoyed this!
The game has great character with the music and the 'simplistic' graphics going together very well.
As I've seen in some of the other comments I also think it would be a good idea to somehow speed up the ghosts. That was probably the most frustrating thing.
I also think it would be a good idea if the difficultly and more importantly the time required for each level gradually increased. The levels (at least for me) got long pretty quick but I think that was mostly down to waiting for my previous ghosts.
Overall I really enjoyed this and I think the 'golf' idea is very creative. I'd love to try this again after you get a chance to tweak the gameplay a bit.