It's a good job that the badge is so easy to get. What a terrible turret defense game. As per the other comments, why have 4 turrets if you can only use one at a time?
Set up a chain of 5 attacks vs two enemies. First attack kills first enemy, end of turn??? Ummmm, no, now use the 4 remaining attacks on the second enemy
nice move on from this dang genre its growing stale anyway