My desktop is a E5-1230 v5 (i7 class CPU from 2015) and I played for 15-20 minutes with no noticeable slow down or increase in fans. I was using chrome. I thi

My desktop is a E5-1230 v5 (i7 class CPU from 2015) and I played for 15-20 minutes with no noticeable slow down or increase in fans. I was using chrome. I think your experience has more to do with laptops being much slower than desktops than anything do with how poor chrome is. As for "optimized enough", seems like the whole point was to put non-trivial physics in the game, and not to cheat.