Tip for beating bosses: Send a few horsemen with the ice spears and a fast attack speed, use haste. Freeze-locks the enemy! Boss has no chance to do anything, just sit around until you win!
Wasn't sure how to use health packs, turns out they're automatically used when you die. Also took me a while to realise you were healed fully after each night.
 "My Little Army"){kind=icon}
 "Endless Zombie Rampage 2"){kind=icon}
 "Level Up!"){kind=icon}