This was in chrome. I tried looking for hardware acceleration options, but it looks like they are already enabled. I'm gonna try the game again tomorrow, because I wanted to get a little bit further :)
Oh but did it freeze? The stutter seems unavoidable due to Godot's shader compilation. The only current solutions for that are finicky hacks that introduced lots of bugs so we decided to let initial stutter stay, after the first minute the experience is way smoother.