Hello Food Eater, it is nice to see someone who is enthusiastic about world building. Indeed, it seems as if the community is very sparse, more sparse than Siberia. However, if you have any new worlds made by you or your children, I would be very much happy to test them and to provide tips for improving levels and the overall design of any worlds. I myself used to design worlds for SWC, I also tested several. It is sad to see the community become downgraded, I have had many memories with this game. I am currently a university student now, but if you would be interested in my testing services then I would be much enthused to have a crack at any worlds you may send me.
Kind regards!