Oh that's a real bummer! I was interested to see what you thought since you have thoughtful comments on everyone else's games.
The newest release of Godot 4.5.beta1 is supposed to make web games run faster, but it wasn't out when I uploaded this. I'm also working on reducing the size of my games using these characters by animating individual textures pieces instead of lots of textures per character.
I appreciate the feedback and the screenshots. I will keep it in mind going forward. My guess is the problem is the number of textures I'm making your GPU load. It's really heavy in that first town scene. If I'd had more time, it would make sense to take those houses into Krita or Gimp and flatten them into single images.
Though as I'm writing this, I'm realizing one of the first things I made in Godot was a paint program. I could probably create scene that would save all the textures in it to a single file for me, which would probably save a lot of memory. I'm working on another game jam this week, so I may try to do that.
I really appreciate you taking the time to report this! You gave me a lot of really helpful information.