Hello! With this new release, I consider the game complete.
Saving, Themes, Good (enough) controls, Great UI, all is there. There might be a few bugs to fix as people find them, but features are finished.
This release adds better themes: text color control, and a banner.
The different colors of the pieces needed more space on the save so download and run the saveconverter for your OS, otherwise the game will crash when you launch it.
You can make your own themes simply by changing the colors in the colors.txt, and the images in sprites.png, then find a name for your theme and put the files in /3ds/3ds1010/Themes//