I was impreesed by the game however after about the 5th wave i was dissappointed to see only circles and squares as the shapes. Eventually i grew bored and quit. Instead of the shapes just moving, what if they fought back? That would make the game twice as hard and it would keep my attention longer.
Im only missing the radar and the last codex. you could have beat the game on day 1! all you need is 100 gems and then go to the big cpu and interact with it.