Hi Alex :) We're happy that you enjoyed Mannequin Academy. Yours and everyone else's kind support has helped us bring more content to Mannequin.
We will be finishing Diamond Mirage first, if everything goes as planned then it should be ready in March. I'm writing the second to last early access update and the art and music are ready. Hopefully when you see the game released later this month you will be able to play the whole thing :)
If you'd like to know more about Mannequin, here is the Mannequin Academy development status update that I just posted as a separate thread.