I think that a repair all button would be appreciated and I would like to be able to replace all dead soldiers at the same time too. A circular defence mode would be cool too, you know, surrounded by the enemy from all sides. normal mode is way too easy.
OMG TOO SHORT NOT ENOUGH WEAPONS!!! needs upgrades, longer, some kind of better control system, better components (something that turns on and of at a certain pressure((for repeating things like the reapeater and jackhammer))