Demo day-one patch — Kubits Gallery Steam update #286129

Hi, A little day-one patch for the demo, here are the changes: - Cross removes square setting now always removes square - New setting for Square removes Cross added - Fixed a music bug when restarting an already won picross - Win sound (fireworks) is less loud now - Done numbers are more transparent - Hidden picross? Thank you to everyone who played and enjoyed the demo, and to everyone who gave me your feedbacks it's always appreciated. Have fun, Edwin.