I chose the difficult enemy option in the map branch (the first map option) and this enemy is outside of the map. I have nothing that can even target it.
I’ve fought the enemy out of bounds glitch for a while now. Its mostly eliminated but they still get out sometimes. So all you need to do is wait for a couple minutes and the exit portal will show up. It’s not ideal but at least you won’t be soft locked out of a run. The other thing you can do is quit and continue which will respawn and reload the standard level.