Thanks for the feedback. New build with latest updates now uploaded.
Auto repeat on fire button turned back on. Redistributed the speed of the attacking sharks between level 8 and 12 so the speed at level 12 now matches level 14 from the previous build. And increased the rate of the bottom sharks speed between level 8 and 12 to be 20% faster. All speeds remain constant from level 12 onwards. Everything between levels 1 to 7 remain unchanged. Let me know if all feels right now. And thanks again for your contributions to make this simulation possible! It is much appreciated.