Yeah, It's something we could improve upon.
The idea is if you launch Run->Debug, then your game is compiled in a way that they show many errors. Most common is the use of uninitialized variables - it will show the event and the trace back on where you have it. It will not show the position or the name of the variable right now though. I think we really need to add that.
It will also show things like using nonexistent resources (sprites, background etc.). In GL3 it will also show problems with shaders. All of these errors/warnings are for now outputted to console though. So if you want to see them, then you must open a new console window (cmd on windows) and run the game from there (copy the filepath+filename from LGM console). We should probably add that when you run in Debug mode console is visible from the start.
So yes, in this regard we have to still add a lot.
edit: Also, as ENIGMA's compiled .exe's are just C++, then you can also use tools like GDB. But I don't think people using ENIGMA should be forced to use a tool which is not that easy to use (it actually is easy, but uses a console, which for kids is a big no no).