Small problem on the menu screen. If you kill either of the characters with a clickspawn zombie, the "level" does not reset, meaning the menu can never show until you refresh the page. Even more, if you have clickspawn enabled, but not click n drag, this is inevitable.
Why in the world is there a quit button?
Since very few people feel a need to see an unresponsive black screen, this option would only be useful if this was a standalone application.
Since this is not a standalone application (in this venue) it has no use, therefore it should probably be removed.
I'd like to see some visual indicator of damage that doesn't require a mouseover. I've lost way to many turrets because I simply didn't know they were taking significant damage. An optional always-visible healthbar would be nice.
"Boxhead: The Beggar" seems to be a better title. If you want a game to work out on Kongregate, please edit out all IRL money-related elements and long delays.
Small problem here. If you kill an enemy, and they drop a quest Item, and you leave the screen, the quest item will disappear and never drop again, causing your save file to be locked into whatever area you're in. (unless you spend a few hours killing enough of your own troops to change factions.)