a few cool little things i've noticed with the jumping system i turned into full-on moves
high jump; jump, land sideways, jump again- time it right and you'll rocket into the air, long enough to perfectly land a flip
long jump: jump, pelvic thrust in the direction you want to go (tap < - > - < to go backwards, etc)
stairs jump: stairs act very similar to ramps; you can get extra distance from them by jumping up, landing directly on the stairs and pressing jump again as you lean to the side/fall over