I think some mention of stamina would be good.
Regarding the crash, I'm inclined to think it was some bug rather than a general performance issue, since it crashed at the exact same place twice, and other than that it was smooth. The machine config is decent I would think: Firefox/MacOS Sonoma 14.5/16GB RAM/8CPU/10GPU.
Anyway, I tried the Mac desktop version, and it works fine. So with the Wizard the game gets even better :) Lots of nice combos here. I'm right now at some Wizard level with 3 abilities.
Well done overall!