I'm also clueless
Maybe you have the most recent graphics card or an old one
It's develop in windows 10 machine with opengl 3.0 support, I'm using the Godot's compatibility mode, it's expected to work for most machine that have opengl 3.0 above and newer graphics card with legacy support
I'm really sorry there's nothing i can do, maybe try on other machine like linux or an "Android phone" (about to release on the next update 0.4)