Maybe have a feature for "Forge" that enables us to turn one resource into another? I have a massive amount of certain resources that I'll never use, while greatly needing others that take forever to farm...
Did you lower the level IV cards with the gold packs? I've opened 20 packs recently, and gotten literally zero level IV cards. It can't just be bad luck...
Good game until the second to last level produced an invulnerable zombie. I tried every weapon and nothing hurt it, yet it had no problem hurting me. 2/5.
Wow...this was a great game, nicely challenging until level 11. Level 11 turns the game into about a 2/5. Why make a game that kills its own fun factor by having the AI nearly perfect? A flash game shouldn't require hours of practice to simply beat a level...