Whaaaat :D
Wow...man..good work..I didn't thought this is possible. I have a million questions.
First: I've made an overhaul to the survival balance. It will be progressively harder now, because it wasn't.
Second: Please tell me about the performance over increasing waves count? Did you encounter some spikes while playing or there were spikes only when loading next batch of enemies?
Third: Please share on what machine are you playing this.
Any info would be much appreciated!!