The Zoom animation mode allows click-throughs before the HUD is completely hidden.
This is due to the fact that a transform is applied in order to scale the HUD. This transform scales the the HUD's invisible background and thereby allows touches to be received by views that are not covered anymore.
The best solution would probably be to separate the actual HUD from the invisible background (a new view) and do animations just on the HUD. This should also produce a better autoresizing behavior.
Another solution would be for the invisible background to implement -hitTest: and always return YES, thereby making its actual frame irrelevant.
That's a good suggestion. Unfortunately it won't help with #36.