Okie dokie, just went back to double check things are working on the web version. They are, but this is just a case of my failure to give feedback to the player as to where they are in the radio frequency range. What I suspect is happening is that people are running into the same issue where it isn't clear that left and right click do different things (on the radio LMB is up, RMB is down) and then once they hit the top of the range and don't find any more frequencies they assume it's broken.
This is totally not you or anyone else's fault. This is a failure on my part since I didn't include the player feedback I had planned to include. Just stuff to fix once the jam is over and things to think about and prioritize in the future.
Thanks again for at least trying the game and giving your honest feedback! It is much appreciated.