I've noticed a couple of issues in the Web Build. Most important one is that you can get stuck, by going in between the three rocks at Central Beach. You can faint out of that spot, and it is somewhat finicky to get in there, but I don't think you are meant to be trapped.
Also, there is a shadow of a balloon by the first sigil that tells you about whether you've found all the sprites in an area, with no visible baloon, and there is no balloon near where the girl who talks about the pea shooter is to hit, despite there being a stone circle and a gap in the wall.
Because there doesn't seem to be any audio in the wqeb build, some sprites, mainly those in the reeds, reqiure guesswork to find. This is also an accessibility issue for hard of hearing players. Finally, you can walk on top of the rocks that make the face, which i think is unintended as most rocks can't be walked up.
Other than that, good work.