Tower Debt-fender

You are a new finance intern at the TowerDefenders.Inc and you've already been sent out on a mission.

Being a tower defense engineer is hard work, but that doesn't mean you're allowed to waste company resources! You as the intern will go to several locations where engineers have left more than the necessary amount of defense against the few and far between attackers. 

SELL Towers on the level before each wave (or during it!)  in order to pay the DEBT your new company has accumulated in order to progress further.

You will only need your mouse to play.