You have a set time of one minute and thirty seconds (1:30), although it is possible to go past this limit if you're still building up a combo. The goal is to earn points by grinding, doing tricks and flips and to combine all of these. At the end of the game you will be awarded Precursor orbs for every medal you managed to reach. There is a maximum of nine orbs to collect, three for every medal. There is no maximum score limit. In Jak 3, the Industrial Section will be specially cleared out and emptied of KG Death Bots and Freedom League guards, so nothing will obstruct your movement.