After having had sex with the Goo Queen for a second time (first time came inside, second time came outside) as soon as the transition black screen came, the game is now stuck on the black screen. Saving and quitting the game at this point is useless, as the game loads back in the Goo kingdom, on the black screen.

Ya, this glitch was found quickly and I've got it patched for when the public build releases in 2 days.

Fortunately there is a temporary solution:  Pause the game, check your stats screen, back out.  That should restore the screen and you'll be able to see again!

Sorry for the inconvenience!  It's an easy mistake to make on my part but fortunately we've found an easy work around in case it happen during the beta test releases.  Hope this helps