how do you set the difficulty for challenge modes?

(Grampa Murked U) #1

Can’t figure out how to get the stars to unlock stuff

(elevator13) #2

Beating each level automatically unlocks the next difficulty level.

(Grampa Murked U) #3

I beat them all and got nothing. Done them all multiple times now

(Grampa Murked U) #4

All I want are the scopes. Anyone figure it out yet?