Is it just that you want the screen back?

If so, here it is as far as I can tell where you want it. I've had to assume a few things based on the straight lines at the edges of your map. I have also drawn it a reasonable width, rather than the extreme width that would be required to completely cover the land part that protrudes in the north. You can use the move node tool to adjust the screen polygon on that side if you wish.

I noticed that the sheet order was a little mixed up, which may cause you a few problems as you progress. The SCREEN should really be right down at the bottom of the list or near enough to it, since it is intended to block the view of protruding symbols and fills. But since I don't know what you want to do with this map I have left it to you to move it.

I think it looks pretty good :)

You can change the colour of the cliffs using either an Adjust Hue/Saturation or Colorize sheet effect on that sheet. While these effects don't normally work with symbols they will with the cliffs because the cliffs have map files.

Another way is to hold down both the CTRL and SHIFT keys at the same time. The disadvantage of using them together like that is that its very easy to press only the CTRL key for a split second before you hit the SHIFT key, which makes it easy to accidentally scale the label instead of rotating it.

This is the setup to create a collection with your new symbols in the Symbol Manager when you hit the Options button.

Ok - varicolour eggs ;)