great game, only thing I could think about an improve is the survival mode: it´s far to easy, maybe raise the zombies health all 2 min or something so that it will come to an end ^^
I love this game . Maybe you should add a more challenging mode cause if you stay calm and don´t let your power lvl fall down you reach over 100 power after a few waves and just kill everything with 1 blow^^
nice game, only one thing^^ there is a bug : if a longbow unit fight against a berber archer they don´t hit eachother and block the lane for the whole battle