Have you played the third level? You need to manage 20 minions to win xD
But don't recommend you play it from the beginning, it takes too long. I didn't make the level select option.
I played only the first level and some part of the 2nd. But even with 5 minions you really had to start keeping an eye on the stats for all :D
Managing all minions manually would challenging. But I will consider implementing some AI to help. Maybe a minion work as a waiter to serve others? What do you think