I was thinking that you could add an obstacle option for survival, but that wouldn't work as zombies just walk straight at so would get stuck. but maybe if there's a third zombie last night you mightt think about it? brilliant game 5/5.
I tried to complete the first ten levels (hard difficulty) with only one hero (i chose the queen hero) he rat bombers and the demonesses. I got them all fully upgraded after 6 tries on the 7th level then i just gave up on the 9th.
see if you can do it (can be any hero)
I only have two questions: 1. What do they do with all the dead bodies during the day (where do they all go by night time) and 2. what do all the survivors eat? BTW: these questions are NOT related.