Great game. Not too easy to loose attention, not too hard so you quit. Also, it is the perfect length. Ideal 5/5 for a fresh puzzle game. Great music, too.
Bad level design. I know it's a preview, but if about to finish level 2, I fall and when I end falling I find myself on the first level scenario, and having to do it again... that's called bad level design. Other than that it's not that bad, except if we start with the controls and camera controls.
How the hell do you defeat the boss? I'm at the end and it's getting closer and closer to me everytime. No way to dodge and... boom! It kills me! This game basically tells you to grind. And the hitboxes are awful. Really, it could've been great...
Some rhinos, a fire mace, a generate food mace and a healing mace and... voila! You've won. If you wan't, ranged units to back'em up are great, too. Don't bother with deffensive turtle - it will end up more damage than you can heal.
It's $10, and if you don't think it's worth it, that's fine.