Congratulations on unlocking everything, and thank you so much for the kind words! It really means a lot. I'm so glad you enjoyed the journey, and I wish you all the best in whatever you do too!
P.S.: About the Black Rectangle, I've always imagined the turtles as a far future civilization, long after humans have disappeared (whether we left the planet or something else happened), with only a few well-preserved relics left behind. It's fun imagining what stories they'd piece together from the scraps we left behind.