I downloaded the Windows version and ran it locally.
I've got 20 Helpers, 9 Gold coins, 14 silver coins and 35 copper coins and 6.4m banked. I'm currently getting about 0.5 frames per second and it's utilising 7.7GB of RAM which is constantly increasing (memory leak potentially?) and 7.9% of my CPU (AMD Ryzen 7 7800X3D).
Fun game! Just wanted to give some performance feedback.