First off; This has been the most fun I've had making a game ever :D
Also, after my first 16h of hard work I'm feeling confident in me being able to finish this game in time!
As probably expected everything in here is subject to change but the broad idea still stands :)
So the idea of my game is that you Have these Source Fountains around your map which you want to harvest.
You harvest them using Draining Towers that you can place unlimited amounts of, BUT Be aware, placing down a tower that harvests fountains aggrevates the Source Protectors (Also known as "Seekers") and will make them attack your towers.
Your company has a tight deadline so you need to harvest the Source within a time-limit while protecting your towers.
Here are some WIP screens:

Seekers currently don't have a model (can't decide how they should look :P) so that's a thing for tomorrow to do