I've noticed many (if not all) android games don't support the "back" button functionality during their loading screens. Which leads to some frustrating moments when a user accidentally starts up the game and has to wait for the long loading stage to end in order to close it.
So my questions are:
1) Why is that ? Is there a good reason to avoid something like asynchronous loading (or some other solution to this problem) in android games ?
2) If there is no good reason not to support this functionality, what would be the best way to accomplish it ?