Here are the patch notes from the v 1.02 update to the game:
Bug fixes:
Fixed the Betelgeuse sector end level sometimes not triggering.
Fixed the sector rewards (they were incorrect and sometimes rewarded twice).
Added the missing sounds to the "speed up" and "speed down" platforms in the Mazinger sector.
The Avatar of Brahma now correctly has less hit points if you managed to get to him faster.
Another tentative fix for the black screen issue.
Thank you for your patience and please report any bug to the troubleshooting forum!