Thank you! The safezone gives you a +100 points bonus. An 2x multiplier would probably be better with hindsight. Yes, chaining speedups was a choice I made, nice to see that you discovered that! Awake zombies are limited to 256 for performance reasons, but I think one could go even higher. After doing everything correctly, avian performance was fine! I reduced the number of physics SubSteps to 3 from the default of 6. I bet I could go with a single SubStep for this game and increase the number of zombies to 1k