Looking good... as mentioned above the trees aren't bad, but I suspect you'll do better in time.
There's about a 10% chance of somebody getting the 2-territory region to start the game in a 2 or 3 player game, and around a 6% chance in a 4 player game. In case you were wondering.
In terms of gameplay, I'm still troubled by the sheer size of the Arctic and Sub Arctic regions. Arctic will be impossible to take in most games, since it's not only 13 territories but the easternmost and westernmost territories are nine regions apart... and the region directly south of it won't be much easier. And historically, these would have been the least populated regions of pre-Columbian North America, yet they seem to be among the most densely populated regions of this map with many small regions. If you were to represent every nation as small as the Tunimiut, you'd have to add hundreds of regions to the great plains and both coasts.
When you consider how tough life is up there it makes sense that the Arctic region wouldn't be a source of great military might... I suspect the Tunimiut never enjoyed the same kind of warrior reputation that the Aztecs did.

So it shouldn't really be an easy place from which to begin an empire on this map. But from a play perspective you also don't want this to become a dead zone.
Since I've mentioned them twice, I tried to google the Tunimiut. I came up with nothing. ??
You've done a nice job of representing the original names of peoples, but Baffinland sounds like a European name. Again, I googled and came up with Baffinland Inuit, so this would seem to be a nation already represented on the map. And I know, somebody is going to say that there are important differences in the lifestyle of the Baffinland Inuit vs. their southern neighbors, to which my response would be that the differences aren't nearly as great as those between the Aztec and the unrepresented Mixtec (for example).
And I'm not saying you should start adding every unrepresented group - there has to be a line drawn somewhere - but I do think that some of the Arctic nations can be dropped/combined to improve gameplay without sacrificing the historical integrity of the map.