when you place an extractor on a moving or stationary belt the whole game crashes. If you try to restart in the same world the game keeps crashing. Would be nice if you could resolve this problem. By the way, i love this mode, it's truly magnificent. Keep up the goop work!

Thanks for the report.
Does this still happen in 0.2.2a? Also, if you sent us the crash-report we will be able to track down the issue better.