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In the Time Boom race mode, you'll need to avoid obstacles and get to the finish line before time runs out.
As you unlock bird racers, they will move up to your tree where you can select them when your current bird is "tired."
Each track has five different events with the champion ship race (where you earn the pictured bird) in the middle.
Once you earn the coins, you can buy upgrades for your car that will help you beat the competition.
The freemium limitations require you to wait 20 minutes for more energy or pay with slow-to-acquire crystal currency.