This was pretty cool! I'm a huge fan of turn-based tactics, I got real Hoplite vibes from this. I liked the mechanic of placing your own enemies, although I was able to cheese the game by blocking myself off in a corner for 6 or 7 turns, getting 20+ energy and no extra enemies, but I had a lot of fun figuring out the cheese and capitalizing on it.
I do wish there was a way to see what your enemies could do - knowing that it'll get as close to me as possible and shoot if there's LOS doesn't do too much good if I don't know how far it can move. Overall though, great job!