oh and another thing:
very often when I like want to go jsut right for a while (or left, same issue), I hold my right arrow down and just press space when a jump is needed.
however I often come to stand in front of a wall, still pressing right and space does nothing.
it doesnt jump up so i could walk furhter.
so yeah, presing against a wall disables jumping apparently.
milder inconvenience.