haha, loved it!
Amazing game! Managed to get score of 20 :)
ConceptGraph which is made with Godot too, has nice Color Scheme going with the nodes (Color Codes for different types), maybe take a look at it?
Actually, the problem doesn't come from the Y-axis remainder, but the parameter floor_max_angle doesn't seem to work correctly in the function move_and_slide_with_snap and move_and_slide
Oh sorry, I meant 5-10 degrees difference on already 90 degrees slope.
Very helpful, but if we get only the Y-axis remainder, if you try to climb too steep slope (like 5-10 degrees), you will be able to climb it, even be pushed in the air.