shiftless in an category where you can't press shift (wich makes long jumps, backflips, normal crouching and ground pound not possible) this would make the ice creams making the longest jumps possible, The secret of the mirror not possible and its an challenge like wasdless, spinless, diveless, jumpless and glitchless (it's also nmg)
it is posible to get the secret of the mirror ice creamhttps://www.youtube.com/watch?v=WKkt2XJRHog
longest jumps possible would still be possible actually, else by rmlaunch or by respawndiving (idk the actual name) (marking checkpoint, falling in the void and spamming dive) unless this respawn glitch requires groundpounding
Didn’t test it but I think it’s probably possible to just dive through the wall for the mirror ic
mirror is possible by going to the spot where you normally crouch into that and you just dive then you on the other side