Debug Problems

I've checked the code, but does that imply I should program everything inside a try/catch block? :X

Just put your mainloop inside it.

Try    ' error handling
	 Yourgamestate.start() ' or "Game.run" or whatever you want

	 Catch o:Object
	 HandleGeneralError(o)
End Try

Then your complete code is running inside it.
No need to change anyting else in your program.