Just work on 1 corner, make it as dense as possible. Then you can get a 2nd corner, making it as dense as possible. Combine them. Don't get any bigger, you can't keep up.
Points get spent as soon as you click icon, even if you can't train anyone.
Also, how did 4 enemies walk past 3 of my guys in first wave and none died?
Needs to be "smarter".
that ending is far too "do or die".
Skill progression is too slow and those end of round scenes are kind of dumb. Too much value for no mistakes allowed.
Its annoying when you get hit 2-4 times on same attack. If you get hit from lazer on top, you'd dead, as you can't not get hit on bottom.
Also done if you level up during lazer on top, as you have no time to get up.