Crafting a Jump Pad requires 3 items, a rabbit's foot, a slime block, and a phantom membrane.
After acquiring all these items, throw them on a block and see what happens.
to remove the Pad, simply throw a blaze rod in the middle.
P.S don't remove the terracotta, it's responsible for disabling fall damage.
Jump next to a wall while sprinting to start wallrunning.
Sprint while sneaking mid-air, this will result in a double jump.