Wall Hanging: Face a wall and W + Space double-tap.
Climb Up While Hanging: Press W + Space while hanging from a wall.
Climb Down While Hanging: Press S.
Ceiling Grab: Double-tap Shift while at least 0.7 blocks above the ground.
Release Ceiling Grab: Press Shift while hanging from the ceiling.
Long Jump: Hold Shift + Space after sprinting for at least 1.5 seconds.
Slide: Double-tap Shift after sprinting for at least 1 second.
Fall Damage Reduction: Hold Shift while falling.
Landing Roll: Release Shift within 0.5 seconds after landing and taking reduced fall damage from holding Shift.
I'll probably make a separate mod next that adds the kinds of exercise equipment we commonly see at gyms, allowing players to increase their stamina and adjust the stamina consumption.

