(Last bug report)
-If the player climbs but only moves horizontally, it won't play any sound effect. Sound effect should play at both cases, when climbing vertically and horizontally.
-When climbing a vine, set the horizontal to 1.5 and -1.5 instead of 2 and -2 (like in SMBX 1.3).
-if the player detaches himself from the vine and was climbing up (I mean this), set his vertical speed to 0 (if his speed was equal to -2 then set it to 0).