I lost the first round until I figured out the controls (clicking for moving and targeting). Having a knight appearing as second enemy didn’t help…
I believe, this game would benefit from some restrictions. Like, having only so many minions at one time. Or restricting them from overlapping. Or making the enemies from different sides (instead of always from the left). Or let your minions disappear after a certain time.
In the end, I managed to get a few minions out acting as shield long enough that I could cast enough of them to hide behind indefinitively.