You can see the progress in the quarterfinal video:

Works:

• 1st button - backlight control
• 2nd button - 16 modes of spectrum and VU meter: https://cdn.hackaday.io/images/8052571408534158067.png
• 3rd button - 8 different symbols to draw spectrum bars
• 4th button - 3 different algorithms to draw spectrum: linear, linear with small values boosted, non-linear
• option jumper - vertical VU mode:
  

Missing:

• serial interface
• vertical VU not finished