It's my first post here, I wanted to make a game based off Mortal Kombat 3D era games (Deadly Alliance, Deception, Armageddon) and I wanted to use Z-Axis to have characters walk left and right, but there is one problem, the jump button only sets Up key (Forward and Backward Jumps also works) but I don't want straight jumping key available and replace with diagonal jumps only (only forward and backward jumps available).

Also another question is can I do the same with Crouching?
I wanted crouching inputs to be just only forward/backward + down key instead of just down key as I wanted to replace the down key with Walking Right on Z-Axis.