It's a neat little TD game once you start, but quickly turns sour once you play enough. I wanted to like it. I really do love a good TD game, and this one looked charming. However, the flaws in this game turned me away from playing much more than an hour.
There are certain features that make absolutely no sense whatsoever, such as losing coins when touching enemies. The only purpose of the little guy you're controlling is to either build towers or slowly upgrade them manually. Other than that, it can't really do anything to the enemies, which then raises the question of why must I be punished for touching enemies then? It stops me from collecting valuable resources, and makes it even more difficult to get across to try and build more towers if there's a large swarm of enemies. This adds no strategic value, and only ends in frustration with the enemies.
The enemies, from what I gathered from the little I played, are pretty bland. Your anti-air towers are basically useless except for a few instances later in a game when the enemies get a little harder. Others are just frustrating because of the game's lack of balancing for quantity vs. quality of towers. Spiders, for instance, are very fast and come in great swarms, but easily crushed by cannon towers. The problem is, they move so fast that you can only get one, maybe two shots in from the cannons, and are difficult to kill fast enough with arrows. Golems are pretty much invincible execpt for cannons, and although they're a bit rarer, these ones you're definitely going to need some heavy upgrades on your cannons. Air enemies are basically a joke because as long as you have a decent amount of arrows, which you're going to need from the start, they're easily taken down. This isn't necessarily a bad thing, but it doesn't exactly add to the challenge.
So, as I said before, the design of the game really hurts the balance of quality vs. quantity, because you're either going to have to throw an enormous amount of cannons everywhere, which is difficult as it is because their range is so short, or pray that a few heavily upgraded ones and a few other towers will do the job. Because of the angled perspective of the game however, half of their range is nearly useless because it will be blocked by trees or other towers. So the one tower that is incredibly useful and powerful without needing massive upgrades is half useless because of the perspective and range. On top of that, and this is another major point, the enemy paths on this game are going to frustrate you to no end. You have little-to-no indication of where the enemies are going, nor even a small arrow at the beginning to give you an idea of where they'll start. You basically have to guess how close they're going to be in the middle of the paths, or if they hug the sides. Because the overall paths are so wide, it makes it hard to gauge where you should be placing certain towers, such as the cannons. This is severely debilitating, as it can force you to have to restart a level simply because of finding out your towers are far off from where the enemies are going, so all that happens is they fly by and leave you annoyed.
I hate to review a game with so little play time, but with so many major flaws right out of the gate, I don't think curiousity really warrants trying more of it. Maybe if it has a major sale I'd say try picking it up to try, but other than that, I can't say I would recommend it. Considering it's a year old, I wouldn't expect it to get any better any time soon.