As you get further into runs, you'll notice bonus items that you can
use to help you along. Powering these up can be done from the main menu.
You'll have to cash in your bananas and tokens though so it's important
to choose wisely. For example, if you're going into a challenge that
requires you to break through a lot of ice using the freeze ray, level
up the freeze ray by cashing in bananas. This will make the challenge a
lot easier and allow you to advance faster.
There are a few power-ups that are always safe bets and always benefit
you, and those are the ones that net you large amounts of bananas. So be
sure to level up the Banana Splitter and the Fluffy Unicorn whenever
you can. More bananas means more upgrades.
Collect your silver prize pods
While you only need one fruit to advance to the next level, you can keep running in order to collect 2 more. Essentially, this is just like getting a 3 star bonus. Some items you'll want to collect can be obtained through collecting enough fruits in each stage, like puzzle pieces to unlock costumes. You may be able to advance but you'll need a specific number to collect a silver prize pod, even more for a Despicable multiplier. Both are worth having so trace your steps and be sure you're completing each level to the best of your ability.
Log in daily
This goes along with my tip about Facebook but in case you didn't realize, every day that you log in to Minion Rush, you'll get a banana bonus. This isn't dependent on Facebook so even users that don't tie to a Facebook account will get the banana bonus daily. If you do though, you'll also get a Gru token for coming back every day.
Disco Room
Whilst playing in Gru's lab watch out for a pipe to your right with Bananas on it. You can steer toewards that for a bonus portion of the game in the Disco Room.