Thank you for your comment! The stopping mechanic on landing was actually made on purpose, I agree that it can feel clunky and slow down the gameplay, but at the same time I wanted the player to feel in control as I've seen too many platformers with landings that are reallyt difficult to perform since the player just kept sliding on the platforms, and this was supposed to be more of a puzzle platformer instead of a skill based one so momentum wasn't my biggest concern. But again, I agree that it can be annoying, now that I think of it I probably should have just divided the x velocity on landing by some constant instead of just setting it to zero, thank you for the suggestion :D
As for the debug part it really went over my head, you're right thank you again for noticing ;)