Hello guys!
As of 0.7.1 which is our latest build, most of the bugs mentioned in the thread have been fixed. Performance is still a bit intensive on lower end machines, but you may see a boost as we now unload all enemies that are not onscreen, and have simplified their script calls.
We should see another boost in performance once we unload stage chunks too, that is currently the biggest resource eater. Debug stage runs pretty well in comparison!