Enter these cheats in the cheat menu. To get to the cheat menu, go to options then cheats (the picture of a lock).

quezdontsleep = perfect manuals

justin bailey = perfect stalls&handplants

bigupyaself = perfect grinds

skeleton = all keys

up 2x, down 2x, left, right, left, right, baba = all levels & park editor

down, right 2x, down, left, down, left, down, right 3x = all characters

left 4x, right 4x, left, right, left, right, up = superspin

up, down, up, down, left, right, left, right, ababs = low gravity wall rides