Pico explorer tetris build on VS Code

Hi, I just got pico explorer. Download files from GitHub to Raspberry Pi 400 that connected to Pico. Follow readme and trying to build but I got bunch of errors during build.
Clear error one by one but I still getting new error and I have no idea on "picotetris.cpp line 176, "pico_explorer.set_backlight(100); error.
VS Code is asking "Do you mean ‘set_clip’? but demo video shows using backlight thus I tried with different number to build but all came back with error.
Could you please show build/compile step-by-step?

Just remove the set_backlight line. They realised that the Explorer’s backlight is not actually user changeable so they removed the function from the library.