Hi Matvai!
We apologize with the 0.6.8 bugs, Jades launch introduced a lot of new issues we didn't anticipate. We'll be cleaning the build of bugs as much as possible and performing major optimization improvements before releasing new characters.
Most bugs reported in threads for 0.6.8 should be fixed! Some users still encounter loading issues with stages, but enemies now unload when off camera and have their ai calls reduced. We plan to unload stages in chunks which should solve the most common loading issue.