I just wanted to share the errors i ran into trying to get the editor (and compiled games) running.
I don't know much about Debian or Linux in general so feel free to correct me or explain things.
First of all you should probably do:
> sudo apt-get upgrade
> sudo apt-get update
> sudo rpi-update
Error about missing libGLESv2.so library:
> sudo apt-get install libgles2-mesa libsdl2-dev
After getting the rror
Error: "Core.cpp:222: int main(int, char**): Assertion `EGL_FALSE != result' failed."
I ran the following commands
> sudo apt-get dist-upgrade
After that it all ran nicely.