Yep, I have added the towers part later in the process and managed to make something what could be considered a proof of concept :-) I planned these dumb towers, automatic targeting towers, beam towers, rocket towers. They even sould have their own "battery capacity" so for a while they could work without source, and there should be a small "batteries"/portable cores with limited capacity which could be recharged near the main core to make it more tower defense on larger scale. Thanks for playing :-)