i'm aware of the "wall-friction" issue - i couldn't figure out why it was happening. i have a feeling it has something to do with godot's physics even though i'm using a CharacterBody2D so i don't think it should have friction against walls? regardless i apologize for the issue.
EDIT: oh, it's because it ends the jump when you enter wall-slide. so of course you wouldn't be able to jump as high. im stupid .-.
as for the ability to walljump on a single wall, I kind of just assumed it would be bad for the game's design and tweaked the wall jump physics against it. perhaps we should reconsider in a post-jam update. (but i do feel like it would make springs less useful. (or, i guess they would still be useful when entered from a booster, (or when there isn't a wall to climb. (and the spring is faster than a wall-climb.. (should i even worry about this?)
anyway, i'm very thankful that you decided to play the game and even comment on it!