It's a Tower Defense Game.
Kinda reminds me of Plants vs. Zombies Adventures, before they canned the game.
The controls are a bit clunky: when you assign a movement command to one of your Selknams, it will commit to the move before you can reassign another move.
So in other words: if you misclick, you're boned.
A feature that would be helpful would be to label the units upon purchase, especially the caster type "towers".
Just because a caster has his eyebrows angry, or two points on his hat, etc., isn't the best way to distinguish the Selknam. Adding a hover-over label would be simple and to the point. (Because they look too similar)
Some of the Dialogue between the Europeans and the Selknam are hidden behind the character portraits: a minor detail, but one that needs to be polished, nonetheless.
All in all, it does the job, but I wouldn't purchase it for $9.99.
Doesn't look like there's a lot of replay value to the game: I think once I flip this game and unlock all of the achievements, I probably won't play it again.
The graphics and style of play are... cute, to say the least.
It's an OKAY title at best.
If you're looking for a fun, quick way to kill time, then go for it.
Otherwise, spend your money elsewhere.