Today soldered my new TinyPICO. Flashed MicroPython v1.18 of 2022-01-17.
I tried the tiny-snake example.
In all lines containing the command speaker.freq(0) the error: ValueError: frequency must be from 1Hz to 40MHz occurred.
Changing all the occurrances into speaker.freq(1) solved it.
See functions: play_boot_music(), play_death() and play_sound()