Main complaint would be that whenever you hug a wall, you stick to it too much, making sliding down it super slow. Maybe make it so you only stick to it while pushing in the direction of the wall? And whenever you kick off a wall, you cant dive back towards it, not even while holding the direction to the wall. Being able to do so would make wall climbing have a faster rhythm to it. Speaking of wall kicking, holding a direction while performing the kick doesn't really affect the angle or the arc of the jump, but could be something interesting to try? Making the jump go further or higher by pushing away or closer to the wall.
Being able to config controls would be nice too. Otherwise, this is a very pleasant game! Would love to see its progress in the future.