The exclamation marks will indicate the direction where bombs will appear. You may need to follow a route that does not have as many coins or grind options to avoid bombs.

Do not spend Bucks on continues or to skip missions. Save up for a Superbox instead, and use them only when you are going for a high score.
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• Collect the letters to form the bonus word to enter Skate mode. This is the easiest way to earn a lot of extra coins.
• Do not spend coins on boosts. Instead, save to purchase upgrades, board upgrades, the Gearbox, and new characters. You can watch the advertisements for free boosts.

Use the double jump (triple jump if using a special character) to avoiding incoming missiles, get past obstacles, reach higher platforms, and collect coins for a streak.

Connect to Facebook to unlock Mia. She has a grind bonus, 1 Superbox, and 10 Bucks. You will also start getting a daily bonus when connected to Facebook.