You can do support for OpenGL es 2 in projects settings.I am too using Godot engine.
Oh cool, another Godot user! :D
Eman Quest uses Godot 3.0.6. Upgrading is not (that) simple, because it breaks a bunch of things - things I did badly (like mixing static/instance methods, naming functions "get" and "set," using reflection, and a few other things).
I'm working through all the changes now. If you can sit tight for a few days, I should have a new build out.