After beating it once, it gets pretty easy, you just spam the big units, and the game will lag a lot if you place a lot of small units. But overall I enjoyed playing this a lot :) just some optimizing and it will be a great game.
The art is really good, and the game fits the theme very well. But the game ended up crashing on me and there wasn't much of a tutorial so I was confused at first. Just needs some polishing and the game would be very good.