Hole 13: i didn't see any water around there, but your bunker in the middle of the fairway has a dark spot in the middle of it that looked like possible water level coming up. Could have just been a graphics thing on my game? The small fairway bunker looks a little out of place on this hole may be too small. Also I wish there was Rough around the fairway bunkers.
Hole 14: there is rough around your fairway bunker on this hole. Maybe keep them consistent through the course. I prefer that rough.
Hole 15: there is a bunker on this hole that is half in rough half not.
Hole 16: sunken trees near tee box look funky on this hole. Will explain at the end
Hole 18. I really like the rough in the middle on this hole. I hooked my approach onto the hill, more funky trees.
I am also in the rookie contest. I have been playing those courses. You have probably the most unique greens which is cool, and the golf plays really good.
Trees: so I was making a swamp course with oversize sunken trees. There is a beta posted if you would like to see it. When designing the course there is no wind, but when you play it those sunken trees look really silly how they sway in the wind threw the ground. If you are close to them, it just looks wierd. I ended up scrapping that course for the contest.
Good luck in the contest π