I noticed the mast, and decided to have an closer look at here so. (all black line replaced with bright green):
1. Ruder. Double black line is an no-no in "Shipbucket". What you can do is using a very dark red shading on the ruder to give the look of "close but no cigar"
2. This morings need some work, because double black line is an no-no in SB. But if admin thinks those are okay, then they can stay that way.
3. Here you should use Black outlining with very dark gray in it.
4. There are some areas around here with double black line. Try to fix it as good as you can get it.
5. Double black line is no-no. All things that shall carry some weight or other things should be three pixel thick: "black outlining with the ship color in center" (Black - Color - Black)
6. The same here as in 5. but here you have also some areas with triple or quad black line and that is an big NO-NO. if this part of the mast is black, then you use black outlining and a very dark gray color, almost black.
7. The windows doesn't have an perfect black outlining.
8. There are some stray black pixel here.
9. Basic shading. but an artist can interprets the SB-rule. so long it's inside an limit.
- Corners that is 70-80 degrees or more should have the break marked with an very dark line or just an black line.
- corners that are 45+- degrees should use an dark gray color some are just a bit more pronounced than the main color.
10. shading under overhang. I use one dark line and two lighter line with shading under overhang.
11. The Flag should have an light black/Dark gray instead for total black, since double black line is a no-no.
All in all a very good work, with some new-beginners errors, but not so many that I did expect.
One thing, those very dark gray lines on the turret should be replaced with an dark gray line.