Love the art, and love the feeling of it all!
I might be wrong but it made me feel like I couldn't be killed by those towers, and that they're very rarely shooting at all. It made me feel like I didn't have any sense of urgency and I can take my time without consequence.
I was also surprised when I won the game, because I didn't know why. I know it had to do something with collecting crystals, but now that I think about it, I think it's because one of my guys was standing on a crystal spawner.
Overall like aesthetics and mechanics.