Which version of Godot did you make this game in? I made a 3D game in Godot version 3.5 to learn the engine. You can find it on my Itch portfolio. I didn't like how big the export file size got at the end.
I'm making a small 2D project in Defold now, and the total file size is less than 3 MBs compared to Godot's 45 MBs when I export to HTML5. Give it a spin.