In a world dominated by violent media, Americans are no more eager to go to war than they were in the 1980s or the 1960s or the 1940s. Hasn't it always been someone else's problem?
The overwhelming majority would rather go on thinking it had nothing to do with them and there...
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.