Thanks!
The artifacts seem to be caused by something that happens when exporting to the web. Seems to not happen on the exe at least. I'll try and find a fix to that.
Tiling is probably possible, so should be coming at some point.
For the blackness, you could disable the dust or nebulae layers. Or do you just mean toning those down a bit? I agree that it sometimes too much though.
Thanks for the suggestions! And glad you like this one also!