- "when the lizard reaches the top of a ledge I kept falling off if I wasn't trying to move 'towards' the ledge and was just climbing up"
That is a very good point! As-is, climbing past a ledge only grants a minor height boost; I didn't consider granting (very) minor horizontal speed as well! That is something I will look into further; it would be a great anti-frustration feature.
Thank you for the feedback!