I'm curious, what's the third ability supposed to do? To me, it seemed like I could only activate it by putting it on the placed goat or yeti, and it made a rumble sound. So I thought it was some kind of earthquake speed boost to my units, but it was really hard to tell. At first I had no clue what was going on but after losing once and then reading that you could move the camera, I figured out that my job was simply to kill all hikers. I then noticed that the goat and yeti were auto-attacking and using it again would just move them. Lastly I figured out that the icicle killed units even before it dropped, which made the game a lot easier:
I enjoyed it, and well done on the pathing and the art style was fun. I particularly think the cover image is very well done. I would've liked a way to restart the game when you lose though.