Unity's webgl builds have a known bug that kills frame rate on some games. That's an official bug and there's nothing I can do for that sadly :(. And the game is 17mo large for a tycoon 3d game, I can tell you it's extremely optimized!
maybe for some RTX yes, but I have a slightly weaker laptop and as soon as I turned on this game, the fans went at full speed and it warmed up completely. Where in Goward Legasia it wasn't so bad.