I will port Blocktopia eventually, I'm on vacation right now and don't have much time to do anything Blockland-related.
Update: none of my maps will be available on RTB since everything uploaded there has to be completely perfect and has to have no flaws even in files that nobody pays attention to anyway, and since they're so critical of anything that is uploaded there. So, just forget the RTB download manager, I'm sticking to using my own webhost.