Glad you had fun! I had issues with HTML5 and shaders not playing well together in browser last year for GWJ #53, so I kinda just ignored it this year. Which reminds me... I forgot to credit the shaders I used!
Background - https://godotshaders.com/shader/perlin-procedural-water/ - by flytrap
Bell Ring / PA System talking - https://godotshaders.com/shader/ripple-shader/ - by Nevoski