This is a good framework for a game, I'm interested to see where you take this, It's already naturally fun to just mess around with your group of minions; my main concern is responsiveness, it's not totally clear how to control the minions. Perhaps mapping an "all move to here" command would be nice, or the ability to drag and select a bunch like an rts.
Having a set of base mechanics that are on their own engaging, even without prominent challenge or polish is a good sign. Keep it up!