It ran great on the web. I really appreciate the render distance, being able to see across the whole island was pretty magical. I'm also impressed you tackled a 3d adventure so well for a game jam, thats pretty ambitious!
I tried really hard to get a long render distance. There's a few tricks at play there. But the main ones are that the grass only renders at about 1/10th of the render distance as the terrain. Not calculating shadows also helped a lot with it.