This is one of, if not the best game I've played so far, Art, Gameplay, SFX and music are amazing !
I see in the console logs of the webgl version that you tried to use FMOD. We know the struggle, we went the fmod route for previous jams, but decided to develop our own package to have dynamic audio because of the really low compatibility of fmod (or wwise for what matters) with webgl builds.
if that can be of any help, here are the settings that we used to make fmod kinda work in a previous jam:
you also need to preload the banks before gameplay, you can use this Fmod preloader for unity for example.
Really good job anyways, the webgl version of the game is 9.9/10, and with the music the windows version goes up to 10/10 !