To start, customize your turtle with a fun color and stickers (you can earn more stickers through winning races). Your goal is to complete the four main races: addition, subtraction, multiplication, and division.
When you start a race, you'll be prompted to answer math equations. You'll need to solve these to get a speed boost, and hopefully win the race! When you answer questions successfully, you'll also fill up your turbo meter. Once it's full, click the Turbo icon in the middle of the answers to get a speed boost. If you win a race, you'll unlock the next track.
As you earn stars, you can use those to unlock more stickers to customize your turtle!