Well....it seems that 500MB is the limit for a webgl version for Itch. Though I cleaned out the image directory, it doesn't really help much to keep it below. Especially as the renders haven't really increased that much. The full image base is roughly 100MB, where Ren'Py gets the rest from, I have no clue. 

What the webbuild does, is create a zip from the game directory....but it also includes the full directory AND the zip in the install zip...does that make sense? Nope, not to me, but perhaps there is some illustrous scheme requiring this overhead.

From version 0.1.12, I am afraid I will either have to lower the graphical quality or move to downloadables....And as I don't want to sell short on quality...it will be download only.