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...
Don't specialise. Upgrade all of your skills as you play.
Gold hangs around for a long time so don't chase it until you've cleared a screen.
Smash stuff that looks smashable, but be ready for monsters to jump out at you.