Real or fake the physics model makes for a poor game because it is semi-arbitrary and even doing all the "right" things your tower gets weak. If I wanted to be an CE I'd have gotten that job.
The combat needs some work. Things just sort of rush to a clump in the middle. Better AI to stay "in their lanes" would help make it feel more tactical.
This game is good but the inventory system stinks as there are simply too many tiny upgrades. I spend more time playing "Inventory" game than the actual game.