Steps Unlocks Level, Levels Unlocks Stuff, the Unlock list is in the Game description above.
Level 1 : 2000 Steps
Level 2 : 5000 Steps
Level 3: 10000 Steps
Level 4: 20000 Steps
etc.
The Unlock list goes to level 100 but is very impty at the moment. I will fill it from update to update!