Really fun game, but the last 10 stages where easy mode once I created 4 type 4 ninjas (the kinda-paladin ones that heal) then I leveled the attack speed + Ice and spam those in a battle.
It would be nice if we had a timer on buffs, an idea would be to show how much time remains on a buff by hovering over. Or just write it on the icon like citadel crafts.