Great start,

I know the feeling. A couple of things. most of which have been mentioned I think.

1) Squarish. Even with the revision, the land seems to angular. I would recommend staying away from all those straight looking lines.

2) The climate transitions are a bit stark also. I would create an intermediary climate between them to soften the transition.

3) I like the bold color scheme. It definitely lets you know what type of climate you are in.

GL,
Marc