Wikileaks, though technically not a wiki, provides an easy means to disseminate information that some find it desirable to share against the wishes of those who find it desirable to keep secret. Aside from the morality of the leaking itself, such a service provides a look into the activities of...
Use your first few passes on a level to memorise the layout.
You'll get a higher score if you don't use bonus items.
Try not to obscure the screen when you play - that applies to both sides of the device.