I'm really glad you liked it! Thanks! Yeah, the undo button was something I had on the original idea and some code leftovers, but I couldn't implement it completely by the end. The reset was a bad omission though, I did not think of that and it would have been 5 minutes.
And level 3 does have that small position change to bait or not. I thought at some point to add a taunt, or make the chase "stronger" so the units follow always the same unit.
You make me want to play fire emblem from start to finish now. I have always bounced off, mainly because of those being very long games more than anything.