For people who hate tower defense games and are here only for the daily badge (like me) - you can simply play the pre-set level a couple of times to get the 100 kills.
For the Formulaic Badge, you can get 5 awards using only the first two tracks. All it takes is a bit of practice and a fully upgraded car. I suggest going for these awards:
Wrong shoes (Win with the wrong tyres)
Winning in the Rain (Win a race in wet weather)
Maximum Booster (Win a race with full boost)
Boosting 10x (Use boost 10 times in a level)
Tarmac Lover (Finish in the top 5 and don't go off the tarmac)
Winning Crasher (Crash and still come first)
 "Pirate Defense"){kind=icon}
 "Monty's Moon"){kind=icon}
 "Formula Racer 2012"){kind=icon}
 "Band Of Heroes"){kind=icon}