Bringing Fieldrunners 2 right into the 21st century, you can harness the power of social media in return for some not-so-subtle bribery. ONCE each day you can tweet your score to your followers in return for 100 handy coins, (which can - of course - be used on Towers or Items of your choosing).
And for clicking on the Facebook link, you'll earn a tasty 250 coins, but be warned. This bonus is a one off! Once you've clicked on the Facebook link, it'll forever be gone from this profile (unless you reset your whole game).