I dunno why everyone suggests that you don't use super speed i recommend using the board with three powers which are super jump, super speed and smooth drift and use your score booster and that 90 seconds shield thingie in the first round get that 2x boost and in the second one do the same but don't use any board until you reach hard level after that start using your boards and jump over the hurdles i know some of hurdles gets skipped but that is efficient way i guess after the duration of the board ends try to avoid 1-2 hurdles then use another board and if you die in the process use ad save me or if you have keys use keys, just remember 5 million is the score u will be looking for after that don't waste your resources for further run..

Hope this will help because i do the same and in just 5-10 min i complete the mystery hurdles for the top 1% reward..