TUNDRA was one of the first Twine games I had every played, months ago. As such, I didn't like it at all, being used to parser games. I also thought the game was unfinished, because I hadn't found an important plot tool.
Having played more twine games, now, I see that this is actually a well-crafted game. I just played it through all the way to the ending, and I like it quite a bit better now.
The game allows you to undo at any time, and there is a map to help you move around. You can pick up 5 or more items in your endeavors. I am told there are 3 endings, but I only reached one.
You are in the arctic tundra and must explore. I found the game very reminiscent of Babel.