I had to play the browser version(i'm on a Mac). The performance is weird, it's laggy but also everything happens way to fast in the game. Not sure what's the gameplay speed on desktop versions.
I was not able to get far due to performance issues but I'd like to give one piece of constructive feedback. Units should auto attack nearest/any target if I haven't given a target. Like this I run around from goblins, my troops run with me and goblins next to them and they don't attack them.